If your SD card keeps disconnecting or disappearing after connecting it your computer, you can follow provided steps below to fix this tricky issue:
When the SD card disconnects or disappears randomly, you can retry to insert the card to the computer again to see if it’s stable to be read.
If the SD card reader is not working properly, your SD card, of course, won’t be able to show up on the computer.
Another way is to insert your SD card to another computer to see if it shows up stably or not.
After these three steps, if your SD card shows up and can be re-accessed, the problem gets resolved then. If the issue still reserves, continue with the following steps to get rid of the problem on your SD card now.
When the computer turns off the Mass Storage Device, your SD card won’t be able to show up correctly. Here are the steps to disable this feature:
After this, check if your SD card can be detected in Disk Management.
If your SD card can be detected by the Disk Management, but it is still inaccessible, try below tricks and make things alright:
Change SD card drive letter