Hi im from Argentina, so forgive my spelling
I was having the same problems as you and my solution was:
Using LG MicroSD 1gb
LG micro sd adapter.
and its works perfectly.
My previusly combination (the one that pumped me that famous error) was:
Kingstone 8gb and kingstone SD adapter,
Do you have the mini radiator cooler? I Jerry rigged a heatsink and 5volt fan from a dead graphics card on mine, but eventually wanna get a real cooler/fan.
My 1500ish games is all hand picked and scraped it's taken me months but zero trash well except MAME.... Tried deleting clones and broke the originals uugghh