Ramdisk or RAM-Disk is a virtual hard drive based on software abstraction that treats a segment of random access memory (RAM) as secondary storage which is similar to hard disks, except with advantage that ramdisk is a lot faster and access time is greatly improved. As there is no mechanical moving parts involved, there wont be question of wear and tear too. Ramdisk has one obvious downside, that its volatile and not solid state. Contents in Ramdisk is stored in computer RAM, which will be lost when the power of computer is switched off.
The following freeware RRamdisk.sys, originally written by Gavotte based on Microsofts Ramdisk.sys, and later being added a GUI interface by lyh728 is not only free to use, it also stable, doesnt have size limitation, supports popular FAT16，FAT32, NTFS filesystems, and supports Windows 2000 operating system and above including Vista.