OCZ 3.5" sata2 ssd drive 30GB - this will fit laptop or desktop. Used with Windows XP on a desktop computer as an OS drive. Had 6GB of software on it, mainly as a read only partition, the rest of the data resided on a big normal drive. Felt as fast as other ssd drives, software starts much quicker than from mechanical drive. Never had any problems with it and will show working before you buy it. $20 firm firm.