Hey I just got a sg4 a week or two ago and all was fine, right up until my micro sd card kept removing itself and remounting... then suddenly my phone would not recognise it anymore with no warning mesages. The micro sd if fine to my knowledge, being able to use it on my computer, even running a scan, to which it came back clean. I even hit the format button on the phone when I first got it. I'm running with a 32 gb class 10 lexar, so am I just blatently missing the obvious or is this a serious problem (eg: hardware problem)
Hello hexs34130, welcome to Android Forums.
Micro sd cards can be strange acting little animals.. and we've seen higher class versions being complained about just as much as cheapos from Walgreen's.
The only time I encountered an issue, I did not even bother to investigate; I just replaced it. Two reasons I did that: 1. As a way to find out if in fact it was the card itself with the issue, and 2. To find out if in fact it was the card itself with the issue.
In other words, replacing the card for 30 bux was worth it as a quick troubleshooting method.
Some cards will become corrupted in a way that they function fine off and on, rather than just crap out for good or even just show the same symptoms more than once. You can scan and re-format and put it in the device and have it work for a long time, then see the symptoms again.
I treat sd cards as being the most expendable part of these devices, with the battery and SIM card coming in a tie for a close 2nd place.
If the new card malfunctions too, try a factory data reset.