Windows phone 8.1 crash

[Tomas Cao]

Hi there, I moved my games to SD card, everything run smoothly, while I was playing a game (Pylon) and I had a call, After the call, my Lumia 620 (upgraded to WP8.1 Dev Review) had no responding. I pressed any button possible, lock screen and unlock but nothing happened. So I had to remove battery then restart. It threw message "SD card error" and required scanning. All OK, but my game data gone away. Now I have to play from the beginning. Is it a bug of WP8.1 about SD card ?

 

[Tumultus]

Sounds rather like a SD card error / problem to me. I have moved everything possible to a 64GB SD, including maps, games and every single app. Used them, got calls in between and no problems at all.

What is the read / write speed of your SD card?

 

[Tomas Cao]

An Apacer MicroSDHC 8GB (class 4), I found this one mistake for me when using class 4, but everything runs smoothly, WP8.1 allows me to install new apps on this SD Card, does it mean my SD card quality enough ?

 

[Tumultus]

An Apacer MicroSDHC 8GB (class 4), I found this one mistake for me when using class 4, but everything runs smoothly, WP8.1 allows me to install new apps on this SD Card, does it mean my SD card quality enough ?

You should use at least a CLASS 6, recommended CLASS 10.

 

[tonygt92]

I had the same problem of phone hanging, I am using a Lumia 525 with 8.1, sandisk 32GB Class 10 card, when I took the phone out of my pocket, the screen was on at its dimmest stuck at the lock screen, had to pull out the battery, got the same message of check memory card, after sometime again hanged, did a soft reset, again memory card error when starting up, now working fine, but lost the smoothness the phone had when initially running 8.1, should I do a hard reset?
What's the keys for hard reset and will I lose all my data on the phone including apps and games, do I need to re install them all, no problem if I lose my save game data