I can`t store in my 16gb transcend any movie over 4gb.it is telling to me that i don`t have any space.thank you for listening.i hope to give me a sollution.regards baslis

You have to format you flash drive using NTFS. but using this option makes your flash drive to wear out much faster..
NTFS is a journaling files system and, as such, reads and writes to files much more often than other file systems like FAT and FAT32. This is because disk transactions are logged separately on the disk as they occur.
To enable NTFS on your drive, right click My Computer and select Manage. Open the Device Manager and find your USB drive under the Disk Drives heading. Right click the drive and select Properties, then go to the Policies tab and select the "Optimize for performance" option and Click OK.
Once you do that, open up My Computer and right click on the flash drive and select Format. There you will see that you now have the option to format to NTFS in the File System dropdown box.