Hello guys, I have this problem for a while and still didn't find the answer. I'm copying a specifc 10mb file to my pen-drive, from any folder on PC to any folder on the pen-drive and all i get is this: 0x80070057 The parameter is incorrect I simply cannot copy the file at all!! The pen-drive in case is my Nokia 5800, in "Mass Storage" mode. Sometimes I cannot copy a single MP3 file, 5 or 7mb. So i have to disconnect and connect again. The source file is not corrupted, the destination works fine with other files. It's just with some files. If I change to another pen-drive, works fine.