On my two computers at home, when I hook up the psp to the computers' usb ports, and try to transfer information, like the monthly official content pack sony pushes out, it can't finish. it says "PSP Content Pack- There was an Error copying the files". Afterwards I try to open the drive and it says "F: The device is not ready". The funny thing is, I can open the F: before I transfer something. Another funny thing is, I can transfer pictures below 30kb no problem. But an even funnier thing is that my brother's pc across town can transfer anything fine to my psp. Is there any way to fix this?