M3i corrupt all my sdcard

Hello

My M3i corrupt all my sdcard
I use a PNY card on my dsi and this card was corrupted after was used on M3i
I tried an SANDISK card and the was corrupted again after was used on M3i

CORE 1.4
SYSTEM 4.7h Multi

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Try formatting your MicroSD card using this tool: http://panasonic.jp/support/global/cs/sd/download/index.html

My MicroSD is corrupted

Have you considered assigning it some community service to get it back on the right track?

where did you get your M3i ? how long have you used it ? Was it ok when the first time you used ? i am afraid maybe your M3i is broken or crashed . and now try best to repair your SD cards and use another M3i or Acekard or R4 run it .Hope you can solve it asap . Good luck !