S8 Keeps Unmounting SD Card

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Android Central Question

I have a S8 with a 64GB samsung micro sd card which ive used flawlessly since i got the phone on release date. However since last night out the blue, its keeps unmounting and remounting the sd card randomly, several times a day. Is there a fix for this?


Retired Moderator
Feb 12, 2012
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It depends on what's causing it. Have you tried just restarting the phone? Or taking the SD card out, wiping the contacts with a freshly-washed handkerchief and putting it back in?

Please register an account here if you have any more questions about it, so you can post them here, instead of starting a new conversation for each post.


Nov 13, 2012
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I had a similar issue with my old Note 4 and Samsung Tablet. When I sent my tablet into Samsung, they could not give me a reason as to why I had the issue, but they put a 2GB Samsung branded card in and no issue. When I got the tablet back, it was working fine with the 2GB card. I put my SanDisk back in and the issue came right back. I thought it to be just a silly excuse to buy their product, but since changing to a Samsung card, the issue has completely gone away.


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Sep 8, 2018
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Sorry made an account now.

I've cleaned the contacts of the card thoroughly and also performed a factory reset on the phone...but i'm still getting the same issue. Every app that uses the sd card eg gallery crashes upon opening

Ive attached a screenshot from sd card monitor.

Are there any other solutions to try?


  • Screenshot_20180907-155548_SD Card Monitor.jpg
    Screenshot_20180907-155548_SD Card Monitor.jpg
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