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Galaxy S7 not recognizing SD card after Android update, screen flickering green, other issues

System updates can sometimes be a double-edge sword so we want to tackle one problem that happened after installing Android Marshmallow on a #GalaxyS7. Of course, we also bring you 5 other S7 issues that were reported during the past few days to us. We hope that the solutions we provide here can help our ever-growing Android community.

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Here are the specific topics we’re discussing for you today:

  1. SD card gets corrupted after moving files from Galaxy S7 to SD card
  2. Galaxy S7 not recognizing SD card after Android update
  3. Galaxy S7 battery drain issue after Marshmallow update | Galaxy S7 slow performance after Android update
  4. Galaxy S7 has multiple problems since unboxing
  5. Galaxy S7 screen flickering green at the bottom part
  6. POP3 Protocol Usage on Galaxy S7 Edge

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 gets corrupted after moving files from Galaxy S7 to SD card

Hi TDG. I’m having trouble with my Galaxy S7 and the external SD card. I purchased a 64gb card to free up the internal storage in terms of photos, music and video files. I formatted the card to the phone and transferred all the files mentioned above from the internal storage to the SD card. I then unmounted the card, placed it inside a USB adapter-stick-thingy, put it in my PC and transferred a load of files from my PC to my phone (music, video and photo files). I then put the card back in my phone and all was well but then I noticed when I went into the Gallery, all the files on the card were showing grey thumbnails. When I went into the Samsung ‘My Files’ folder, it said there were no files, but it showed the card had 2GB worth of data on it. I removed the card and put it back in the PC and the files were all present but whenever I put it back in the phone it tells me the card is corrupt and needs to be formatted. Am I right in thinking it’s the process of putting the card into the PC that is causing the issue? Can files only be added to the SD card from an external source if the card is mounted to the phone (via a cable)? Many thanks for your time. — James

Solution: Hi James. We move files from our phones to PCs like how you did it all the time so we can say it’s a safe thing to do. There may be an unknown software glitch during the transfer that caused the SD card to get corrupted. Wherever that glitch lies we will never know. It may be due an operating system problem on your computer, a firmware issue on your USB stick, or something on your phone. To make the SD card usable again, simply reformat it. If you want to get to the bottom of the problem, you can try to do trial and method by using different combinations of devices involved. For example, if you want to see if the problem lies on the PC you were using, try replicating the process with the help of a different PC. If the same problem occurs after using a second PC, that’s a sign that the first PC was not the source of the glitch. You can then narrow down the sources to just the USB stick and your Galaxy S7.

Can files only be added to the SD card from an external source if the card is mounted to the phone (via a cable)? You don’t necessarily need to have a wired setup to transfer files to the SD card. Your phone can be wirelessly connected to a computer in order for it to receive files. Bluetooth, Wi-Fi Direct, connection to a cloud service and local Wi-Fi (LAN) connection are just some of the common ways to wirelessly link your phone to another device to get files from. The important thing is that your Galaxy S7 receives the files. Once files get through to the phone, you should be able to save them to the SD card without problems.

Problem #2: Galaxy S7 not recognizing SD card after Android update

Good afternoon. I am having a problem after the latest update to the 6.0.1. The phone does not recognize the SD card. This morning i installed an update and after that the SD card stop working or the phone stop recognizing it. At first all the apps on the SD card appeared not available and in grey. And now after a few reboots and take the card out, it’s always “Encrypting SD card…” as a notification and it doesn’t pass from this. When I click on it the SD card does not appear and anything in the card appear. But when I connect the phone to the PC I can see the SD card and everything on it. From the phone, I don’t even have the option to see what’s on the SD card, not pictures no apps. All the apps I had transferred to the SD does not appear and it says they are not installed. Please help. Best regards. — Telma

Solution: Hi Telma. Below are the troubleshooting steps that you can try to resolve this problem.

Create a backup of the important files in the SD card

The first thing that you want to do here is to ensure that you copy all the contents of your SD card to the PC. We assume that you regularly make backup copies of your important files but if you haven’t it’s all the more important that you should start doing it starting now. SD card problems can occur without warning so you want to see to it that all your important stuff are well covered all the time.

Wipe the cache partition

Once you’ve created a backup, the next step is to wipe the cache partition of your phone. This process will make sure that your phone uses an updated system cache. Sometimes, system updates and app installations can corrupt the system cache so wiping the cache partition will force the device to build a new one. Here’s how it’s done:

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

Wipe the phone with factory reset

Should the problem remain after refreshing the system cache, you can also opt to revert all software settings back to default via factory reset. This will not only address possible software glitch that’s causing the problem, but should also help you check if the cause lies on the updated operating system itself. Sometimes, system updates can be problematic so restoring everything back to their default state is a good way to confirm it. If your phone continues to show the same problem even though you’ve already wiped it with factory reset (but has not installed any app yet), that narrows down the problem to either a bad operating system, incompatible apps, or a hardware malfunction. Try to observe the phone for at least 24 hours after the factory reset to notice any change in behavior. Make sure that you don’t install any app during this time.

To do a factory reset, follow these steps:

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

Update apps

If the phone detects the SD card fine after a factory reset, starts experiencing the same problem again after you install back your apps, you should consider the possibility that one of your third party apps may be to blame. In this case, you want to do another round of factory reset, then narrow down the possible causes by doing a trial and error method until you’ll have pinpointed the cause. This can be done by installing apps one by one and making sure that you observe how the phone behaves after every installation.

Of course, you also want to only install compatible apps. Keep in mind that not all apps may be designed to work with the latest Android operating system. Before you install an app, make sure that you do some research about it to see if it’s prepared to be installed on a device that runs Android Marshmallow. You can do that by checking the an app’s installation page in Google Play Store. Make sure that you visit the latest reviews from other users to see if they’re having problems with their own devices. If other Galaxy S7 users report issues with it, there’s a chance that that app may become problematic in your phone too. Mainstream or official apps are usually updated and should work with the latest Android version but it may help to check their installation pages in Play Store too.

If you get apps from other sources outside the Play Store, see to it that it’s safe and compatible too.

Have the phone replaced

If the problem persists despite having done all the steps above, the problem may be hardware in nature. If the phone is still within repair or replacement warranty, make sure to have it repaired or replaced.

Problem #3: Galaxy S7 battery drain issue after Marshmallow update | Galaxy S7 slow performance after Android update

Good day. I am hoping that you would be able to provide a solution. After a software update (I think it was August update) with the Galaxy S7, the phone battery would randomly start draining very rapidly while the phone is not even in use. The device would get hot (battery draining) and very slow (CPU usage?) until a point when it does not respond forcing a restart. This started happening to my phone (S7) as well as with 2 of my co-workers (S7 & S7 Edge). I have identified that it only happens when phone is on Wi-Fi at the workplace (It does not happen at home with Wi-Fi also turned on). No other co-workers with other phones have this issue. One of my co-workers with the S7 rolled back his software to previous issue to resolve the issue. From this it can be seen that it is not the hardware, not the workplace Wi-Fi and not just my device. So it must be an issue with the software rolled out by Samsung. I have reported this to our local Samsung, but unsurprisingly they denied problems with the firmware. Do you have any ideas what may be the problem and have a solution? Best regards. — Martin

Solution: Hi Martin. There’s no specific set of solutions for many Android problems especially those that occur after an update. The best that you can do is to hope that the cause is not due to poor coding, which results to the bug you’re experiencing. Please refer to our suggestions for Telma above.

Problem #4: Galaxy S7 has multiple problems since unboxing

Is Samsung S7 Edge taking serious their customers? Since I got the S7, it keeps switching off, I can’t create new albums on the phone, the SD card goes bananas, phone gets frozen every time I try to wireless charge, and it gets impossible to restart even in safe mode. The phone gets so hot when it gets stuck between reboot and does not go anywhere. Is this how Samsung wants customers? I don’t understand, plan the product, test the product, and then sell the product. all my friends they changing from Samsung to iPhone because of the issues, and I will too, getting tired of the companies playing around when I pay money for something. Samsung is letting android users down. because android is not only Samsung, but most people say, no more android, I think android should make sure that Samsung takes this serious, if not remove android from their side. — Paulo8200

Solution: Hi Paulo8200. If your phone has been this problematic since day one, why stick with it? There are many other reasons why you may be experiencing these problems aside from an inherently flawed product but that shouldn’t have prevented you from seeking for a replacement Galaxy S7. We do own a Galaxy S7 ourselves and we can confirm firsthand that they’re working great since day one. Since your experience is the exact opposite, the only reasonable way for you to get the most out of your money is to either have the phone replaced, or get full refund. We do support some Android devices like Samsung’s Galaxy S and Note series but we won’t hold you back if you want to switch to an iOS device. The best course of action for you though is to simply demand for a replacement.

Problem #5: Galaxy S7 screen flickering green at the bottom part

Hey. I was letting my daughter use my phone in Kids mode, she hands it over to me five minutes later and I have thick green bar on the bottom of the screen. It was also flickering. So I take it from her, and tried to exit out of the program. The screen wasn’t registering anything, so I pressed the power button just once, I didn’t hold it down to shut it off. But now the screen is completely black and is still flickering the green bar at the bottom of the screen. I’ve already tried to do the soft reset a few times with no luck. I also tried plugging it into the charger to see if that might help, but to no avail. I noticed my phone is becoming increasingly hot as I have tried some of these things too. I have that blue light blinking on the front once in a while but I can’t get it to get off the black screen. — Kayla

Solution: Hi Kayla. We think your phone’s screen may have been damaged. To check, simply boot the phone in Recovery mode. Since recovery mode is a separate software environment from normal mode (that runs the operating system), it should help you tell if the issue is due to a glitch at the OS level or not. If the screen continues to flicker green at the bottom part, that’s a telltale sign of a malfunctioning screen. In this case, you must send the phone to Samsung or to a repair shop to have it fixed. To boot in recovery mode, follow these steps:

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

Problem #6: POP3 Protocol Usage on Galaxy S7 Edge

I’ve always had a BlackBerry. Making the switch to Samsung Galaxy S7 Edge. On my BB, I only got the new (corporate and personal) emails, regardless of number. When I delete them from my phone, they never come back — but they’re still on the mail server and I can download them to my PC. That’s when the delete from the server. With the Edge, seems I have to pick a number of emails to get. We go through waves of busy times, so estimating how many emails to load is awkward. As is getting too many and having to re-delete them all over again. It’s a painful onerous, time-consuming process.  I don’t want to sync the phone with the computer. The computer contains all emails for the past 6 years (billing/accounting), plus recent projects not ready for archiving. I don’t want or need anything but new incoming so I can respond quickly. Any suggestions on how to get just the new (any and all) emails downloaded? I’d appreciate any and all suggestions to configure this. Even switching to a different email app. Thanks so much. — Molly

Solution: Solution: Hi Molly. Email behaviors depend on a number of things such as how the app is supposed to work, how your email server is configured to work with a particular app and device, and what email protocol is supported in a device. In Samsung environment (and in most Android devices), the feature that you want may be accomplished by using POP3 protocol.
When using POP3, only one device can download an email. In general, once a device that uses POP3 method has downloaded the email, that email is also then deleted from the server, freeing it to receive more incoming emails. This means that once you’ve also deleted your email from your phone, it’s gone forever because there’s no copy of it in your email server provider’s computers. In recent years, POP has been modified to mimic the behavior the IMAP protocol wherein email service providers can still keep a copy of emails even when they are deleted from a device that uses POP3. make sure to talk to your email service provider about the kind of POP3 protocol they’re using to avoid losing important files. If they don’t support a modified POP3 protocol, you may have to end up using IMAP method.

If your email service provider supports POP3 protocol, you can reconfigure your email account on your Galaxy S7 using it. Kindly check this post on how to setup your email in a Galaxy S7. For a more specific way to reconfigure your email account using POP3, you can also contact your email service provider so they can provide you details such as accurate email server settings, port numbers, and other configuration information.

 


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