what is wrong with my samsung Corby?

maybe virus...with your cellphone can be linked with computer and internet, the risk of getting virus became bigger.... just format and you get your new mobile phone

Yeah I think it's maybe because of your memory card. They usually get corrupted when inserted or connected to a device with virus. Try rechecking it by connecting it to a computer that does not have any virus and see if your files are all gone.

maybe your memory card is corrupted or maybe some one erased when someone borrow your phone , try to go to a near technician in your place so that it would be more comfortable to you i don't have a corby, i have another unit of a cellphone and also maybe your memory card has a virus , when you are sending something via bluethoot