This listing is for a brand new case with 1TB used SATA disk drive installed, this hard drive has been stress tested, sequential read/write test, and surface test with no failures or bad sectors. The case will accept up to 6 TB hard drives. I have been a reseller and computer rebuilder since 1997 If you wish to view my old stats, please view username baccwrw. My new one is biwal6349 , Thank you for viewing my products and have a great day.