I have a 1st gen Samsung Focus running 7.5. About a month ago something got corrupted and I had to factory reset, which I'd never done having it for two years. At the time I decided to insert a MicroSD card I had and it integrated without problem and I had additional storage.
Except... A couple weeks ago, I wanted to swap out my nearly depleted battery for a fresh one I've always kept on hand just in case, but upon restarting, I got an error that the SD card was "missing or corrupt" and I was forced to reset my phone again. Again I included the card and it worked, now with the understanding I can no longer remove the battery.
A couple days later, I attempted to charge with a faulty cable, the battery depleted, and I was faced with the same scenario. Again I had to reset the phone (with the card) and install all my apps and games.
Not removing or depleting the battery I can live with if it means I have the additional storage. However, I'm now left wondering if I can reboot my phone or if turning it off means the card is wiped again and I'll have to reset once more.
I'm upgrading to a WP8 device soon, so it's not life or death, but neither am I anxious to reinstall everything a fourth time. So I'm wondering if anyone has any experience or insight into this scenario.
According to responses to this article, a class 4 card should work without issue. To my knowledge (because I can't take it out to check) I'm using a class 2, which probably explains the wonkiness. I'm not up on exactly what MicroSD classes mean, but apparently my card needs constant power, behaving more like volatile RAM. So I'm still wondering if rebooting completely de-powers the phone, or if the card will still receive power through the reboot process.