Due to limitations in data writing/erasing times of the Flash memory, SSD firmware is designed with wear-leveling technology so as to extend product life and service time. Also referred to as storage block writing/erasing leveling, the wear conditions of each block are leveled equally for the optimal extension of product life to meet system requirements.
If you want to copy a single file larger than 4GB to SSD, Please format the SSD to NTFS format. (Path: My Computer>Right click on the SSD->Select the Format option on the function menu>Select the NTFS from the File System item>Press Start button). You can refer to the Microsoft Help and Support Center: http://support.microsoft.com/kb/314463