Is there any solution for my problem, then please try to help me out. I have a "Transcend 4 GB pen drive" which i keep for my daily use and i have Windows XP on my computer. I can store more than 50Mb size of file on my computer but not able to store the similar file more than 50Mb file in my pen drive using windows 7 on my computer. I have no problem in reading the data present on it, but when i try to write that file it stops the middle of the taskbar and the usb drive disappears. After some day when i connected it to the pc it should me the write protected error message. I tried formatting the drive with both Fat32 and NTFS and also scanned for the virus threat but nothing happened. Any suggestions would be appreciated.