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SD card not recognized by Galaxy S7, photos in SD card are corrupted, other issues

Welcome to another post as we bring you more #GalaxyS7 issues. Many users are now increasingly reporting S7-related issues so we are also trying to publish as many posts about this devices as possible. If you can’t find anything similar to the issue you’re experiencing, make sure that you visit our main Galaxy S7 troubleshooting page.

Here are the particular issues we’re covering for you today:

  1. SD card not recognized by Galaxy S7
  2. Photos stored in Galaxy S7 edge SD card are corrupted
  3. Galaxy S7 keeps showing speakerphone is on
  4. Galaxy S7 stuck in boot loop | Galaxy S7 stuck in Samsung logo screen
  5. Galaxy S7 won’t charge or turn on
  6. Galaxy S7 wired and wireless charging not working properly

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page, or you can install our free app from Google Play Store.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.


Problem #1: SD card not recognized by Galaxy S7

My just purchased SD Card (SanDisk Extreme 32GB microSDHC) is not recognized by my phone. When I first bought it, I formatted it on my laptop, copied my files and inserted it in my Galaxy S7 Edge. It worked fine. A few days later when using ES File Explorer the SD card was not recognized. I did a phone reboot and it was recognized again. Yesterday it happened again. I tried the reboot of the phone and the SD Card once again was not recognized. I used the phone yesterday without the SD Card being recognized. I turned off the phone at night and this morning once again the SD Card was not recognized. Any ideas would be appreciated. — Alan

Solution: Hi Alan. Because the issue seems to occur intermittently, the best thing that you can do is to use another SD card. This will help you determine whether the issue lies on the SD card, or on the phone itself. Make sure that you use a known SD card for this process. Insert the second SD card for a few days so you’ll notice if there’s any difference in performance. If the problem remains, you must there must be a problem with the phone. In this case, you’ll want to do basic software troubleshooting on the phone first. Usually, a problem like this is caused by a defective hardware so if software troubleshooting won’t help, consider repair or replacement. The basic software troubleshooting that you can try in this case includes:

  • wiping the phone’s cache partition,
  • observing the phone in safe mode,
  • Installing all available app and system updates,
  • reformatting the original SD card in the phone and observing it, and
  • factory reset

Refresh the system cache

Wiping the cache partition forces the system to clear existing system cache and replacing it with a new one. This is a recommended troubleshooting step for almost all android issue as a corrupted system cache can lead to all sorts of issues. In fact, it’s also recommended to be done regularly even if there’s no issue. To wipe the cache partition, follow these steps:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Observe the phone in safe mode

Another good thing that you can do in this case is booting to safe mode. It basically restarts your phone to another boot mode, blocking third party apps and services in the process. If you’ll notice that your phone works normally, that is, it reads the SD card fine, while safe mode is on, that’s proof that one of your installed apps is problematic. You must then uninstall apps individually, observing the phone after every app removal, in order to pinpoint the cause. To boot your S7 to safe mode, kindly do the following:

  1. Turn your Galaxy S7 off.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.

Install ALL pending updates

Updates are released for a reason. One such reason is to fix known bugs. Don’t underestimate updates as they can fix issues on their own from time to time.

Reformat the SD card using your phone

It’s highly recommended that SD cards must be formatted by the device they’re supposed to work with. Make sure that you reformat the SD card using your S7 instead of a laptop before using it again. This minimizes bugs and compatibility issues between the card and the phone.

Wipe the phone via factory reset

This should be the last thing a user must do before considering repair or replacement. Here’s how it’s done:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Try another SD card if there’s no phone issue

On the other hand, if the issue won’t occur while using a different SD card, the cause of the issue might be on the original SD card itself. Get a replacement SD card and save yourself some trouble if the issue returns after a full reformat.

Problem #2: Photos stored in Galaxy S7 edge SD card are corrupted

Hello, I have the Samsung S7 edge, and I have read your recommendations for “Using SD Card, the phone takes pictures, then randomly some of the disappear.” I am having that problem, but this odd thing is that I had all of my pictures, then here the last couple days I noticed that some of the pictures show an error image of a landscape photo icon with an exclamation mark on it. Sometimes I can view the picture that is grayed out by clicking on it, but it seems as though the problem may have worsened because now I can’t see them. The pictures that aren’t there are at random anywhere from 2 in a row to 15 in a row. The strange part is, sometime I can see an extra picture that used to be grayed out, but this has only happened a few times. The other day I took easily 50 pictures within an hour and while reviewing, I continued scrolling past those 50 and that is when I noticed the issue with the grayed error picture (landscape photo icon with the exclamation mark). So I turned off my phone for 1 minute and turned it back on, nothing changed, so then i took out my SD card and waited a couple minutes and when i reinserted it. All of those 50 pictures I took were gone. When I put the SD card in the computer, I still see the same grayed out error photos (but the majority of them aren’t grayed out. I would guess about 15% are gray errors) that used to be photos on my phone five-ish days ago. Do you have any recommendations or have heard of similar problems? My phone is a refurbished phone by Ascurion. Model number SM-G935V. Thank you in advance for the help! — Brittany

Solution: Hi Brittany. Corrupted photos in flash media usually show a landscape icon with an exclamation point so if you’re getting them in your SD card right now, that’s an indication that some of your files are damaged. There’s a number of possible causes that can lead to a corrupted SD card so we won’t discuss them here. If you want to know what they are, kindly do further research with the help of Google. The most important thing that you should remember to prevent losing irreplaceable files is to always keep a back up. All types of storage media such as hard drives, USB flash drives, SD cards, etc, can fail anytime. For some, the reason has something to do with how they use their device, while for others it’s the standard wear and tear process. If you don’t back up your files regularly, you only have yourself to blame. Sometimes, even top-of-the-line SD cards can fail for some unknown reason. Always make it a habit of creating a copy of important files. If you want to ask why, the answer is simple, there’s often no way to recover them once they become corrupted. Just like what is happening in your phone right, there’s usually no way to recover your photos or whatever files you lost. Sometimes, special but expensive software can be used to piece together bits and pieces to recover some files but such type of software are usually not available for public use. They are most often used by digital forensic experts in law enforcement. Some companies may advertise that they can help recover corrupted photos online but many of them are actually useless and will charge a user even if their attempts are not successful.

With all that said, the best thing that you can do right now is to copy whatever files you have left to another device, then make sure that you reformat your SD card using your phone.

One of the common reasons why SD cards get damaged or corrupted is when a user interrupts the system when it’s trying to save to or read from the SD card. Make sure that you don’t turn off your phone while saving something to the SD card, especially when it appears to be taking a long time. Some systems may need longer time to save large files such as videos so the general rule is, never interrupt. The same is said when you connect the phone to a computer and transfer files over USB.

Corrupted files are usually spilled milk so there’s no use crying over them. Move on and make sure to prevent the same thing from happening again. There’s often no know how an SD card gets corrupted so just make sure you take care of your device and hope that nothing bad happens to your files again.

Problem #3: Galaxy S7 keeps showing speakerphone is on

Hi. hope you can help please. My Samsung s7 is showing on the very top notification panel that my speaker phone is on. It’s next to my wifi signal and shows a picture of a phone with a wifI picture in the middle. It has just started doing it and have not got speaker phone on. Occasionally it changes and shows no LTE but most of the time it’s the phone picture. Have tried Google it as to why but I am not getting any answers. I am not too good with technology as am 71 years old!!. Hope you can help as I love the phone otherwise and this is only problem I have and had all previous Samsung phones with no problems and I do use it a lot with emails, texts, Facebook, Twitter, games, etc. Many thanks. — Lisa

Solution: Hi Lisa. We’re not sure if we understand your problem correctly so the best thing that you can do right now is to boot the phone to safe mode first and see what happens. Kindly refer to our advice for Alan above on what safe mode is and how to do it. If nothing will change after you’ve booted to safe mode, do a factory reset to wipe the phone clean. This will force all software settings back to their known, working state. Don’t forget to back your user data up first before doing it to avoid losing important files. If you have a computer, you can install Samsung Smart Switch app on it so you can copy your files to your computer. Once you’ve created a backup, that’s the time that you want to do a factory reset. Here’s how to do it:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Problem #4: Galaxy S7 stuck in boot loop | Galaxy S7 stuck in Samsung logo screen

Phone randomly restarts and gets stuck on intro ‘Galaxy S7’ screen. Responds to soft restarts sometimes but gets no further than the intro screen. Have tried deleting cache on recovery screen along with reboot option but having no luck getting past intro screen. Phone will do this for hours at a time and then randomly starts up as if nothing is wrong but it’s not long until it goes again. Phone is brand new, bought for Christmas from online retailer. Phone sometimes will get very hot before it crashes, not sure if that’s related. I’ve tried following as many of your articles as possible but can’t seem to find a proper solution to cure it. Hope you can help. — Josh

Solution: Hi Josh. We’ve come across many cases with similar symptoms to yours and most of them were due to rooting- or flashing-related problems. If your phone is rooted, running some third party apps outside Google Play Store, or has custom ROM, please reach out to other Android community that uses the same software in your phone. A lot of times, issues on phones running unofficial software are caused by misconfiguration so your best course of action is to reach out to the community that uses the software. The same is true if you happen to install an app outside of Google Play Store prior to noticing the problem.

If you didn’t root nor flashed custom/unofficial firmware on your phone, try a factory reset and observe how the phone works for at least 1 day. Make sure that you don’t install anything after a factory reset. If the phone continues to boot randomly, or continues to fail during boot up, bad hardware may be to blame. Find a way to have the phone replaced.

Problem #5: Galaxy S7 won’t charge or turn on

HELP! My Samsung S7 attempted to update to Nougat, I think. It may be Marshmallow, i don’t know. I’m in Ecuador. I don’t remember what Android version i was on. I’m guessing the new OS but i didn’t even get to say yes or no. I plugged it in to charge and walked away. It was connected to my home wifi. When i came back it had a blue screen that said “Downloading — Do Not turn off Target” It stayed like that for 2 hrs. I unplugged it and tried turning it off. No luck. Tried a factory reset, no luck. I removed my SIM. Then Googled the soft reset. By the time i got the soft reset it had 1% battery left so i let it die. Now it won’t charge on the cord, only on the wireless charging pad. it did this once before when Android updated in summer of 2015. Finally some patch came thru and i was able to charge on a cord again. HELP!!!! — Ann

Solution: Hi Ann. There’s nothing much that you can right now. If you can’t boot the phone to recovery mode so you can factory reset it, we doubt that it will boot on other modes too. For the sake of troubleshooting though, we want to give you the exact steps on how to attempt to power the phone back on to alternate modes. If all of them are still unsuccessful, you have no choice but to bring the phone to Samsung repair shop or to the store so it can be replaced. Below are the things that you can try:

Boot in Recovery mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  4. Wait until the Download screen appears.
  5. If you can boot the phone in download mode but not in other modes, that means that your only way out may be to flash a stock or custom firmware.
  6. Use Google to look for a guide on how to do it.

Boot in safe mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.
  6. The only difference of safe mode from normal mode is that the former prevents third party apps from running. If you can boot the phone in safe mode but not in normal mode, uninstall all apps until the issue (that prevents you from booting normally) is eliminated.

Problem #6: Galaxy S7 wired and wireless charging not working properly

Hello. Recently I have been having charging issues with my phone. First, my charging port stopped working all of a sudden. (The phone never had water damage. Great condition from the looks of it.) So I quickly used my wireless charger to see if it would work. Gladly it does work but I have come across problems with that as well. The wireless charger seems to have a mind of its own. When my phone is below 5% and I set my phone on the pad, it will pause the charging multiple times until it runs out of battery and powers off by itself. Once powered off, the wireless charger seems to work perfectly fine. It also works better when the phone has a higher battery percentage. I have done a factory reset, and software re-flash and I am still having charging issues. Hopefully there is a solution to my phone. Thanks. — Joel

Solution: Hi Joel. If you’re having charging issues with both wired and wireless modes and factory reset did not fix the problem, you must be looking at a bad hardware, possibly a damaged battery. Contact Samsung and let them replace the battery for you, especially if it’s covered by a warranty. Otherwise, simply ask for a replacement unit.

 


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  1. Thanks for the tips. My SD card stopped being recognized out of the blue and wiping the cache clean did the trick!

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