Slatedroid v1.3 *is* the Android OS - just a custom flavour of it......so if you "upgrade" it to something else, then you will have wiped whatever OS was there and flashed a new one.....and you'll know whatever it you've gone to or you wouldn't have chosen to do it. The M001 doesn't really do "upgrades". Everything I've seen so far is a wipe-and-replace. What you replace it with may well be an "upgrade" in your eyes - more function, better features - whatever - but the reality is nothing was amended....it was wiped and replaced. Of course the data on your sdcard isn't wiped. Just the NAND (system, user, *internal* app space) in the tablet.