Storage card problems

[jourabchid]

Well ive been having a wierd memory card issue, at 1st my 256meg card worked fine, i started using a 4gig sandisk card and it reads it fine, but always has problems writing to and moving to, and now when i try the 256 card i get the same errors ...

i may have installed something to interfer but for the life of me i can not figure out what the problem is...

has anyone else had similar issues?

i can not move files from internal to external or viceversa...it always prompts and asks to overwrite the exisiting file even though there is no duplicate file...

cant even rename a file...

pleas help