Error transfering files to PSP?

I have system software Version 1.50 on my PSP and I'm having trouble getting emulators to work. Thought it was me messing up directory format, but now I just think I may have a messed up memory card. Everytime I try to move(click and drag) emulators, roms, whatever over to PSP I get a windows error pop up saying "error copying file or folder; Cannot copy filename: cannot find the specified file. Make sure you specify the correct path and filename." This happens after the bar fills to about 75% complete, like it was going to work. Conversely, when I try using KXpolit and moving over some .pbp file that way it normally crashes kxploit. Tried reformatting card, didn't work. Does anyone else experience this? Am I doing something wrong? Is the default mem card that comes packaged no good? Buy a new one? Any help would be appreciated.

This happens to me too :/ I just have to keep trying and trying until it finally works