Thank you for viewing. This is a set of four 2.5-inch 3TB HDDs manufactured by Toshiba. This is a large-capacity set with a total of 12TB. How about using them for data storage in a NAS or home server? 【Product Specifications】 Manufacturer: Toshiba (TOSHIBA) Model Number: MQ03ABB300 Capacity: 3TB x 4 units (Total 12TB) Size: 2.5 inch Thickness: 15mm (*Does not fit in general notebook PCs) Rotation Speed: 5400rpm Interface: SATA 【Product Condition】 All 4 units have been confirmed to be "Healthy" using CrystalDiskInfo. 【Important: About Thickness】 This product has a thickness of "15mm". It will not physically fit in general notebook PCs (7mm-9.5mm thickness). Please use it with external cases, NAS, or desktop PCs that support 15mm thickness for expansion. 【Shipping】 Each unit will be carefully wrapped in bubble wrap. As they are precision instruments, they will be shipped in a dedicated box via Takkyubin Compact (or Yu-Packet Plus). 【Notes】 Returns are not accepted due to compatibility issues or physical size incompatibility. Please understand that these are used products before purchasing. 【Search Keywords】 #Toshiba #TOSHIBA #HDD #2.5inch #3TB #4unitset #12TB #NAS #DIYPC #Homeserver #15mmthick