Capacity: 4 TB Form Factor: 3.5-Inch Connector: SATA Interface: SATA Transfer Rate: up to 217MB/s Disk Speed (RPM): 7200 RPM Recording Technology: CMR Cache Size: 256MB Dimensions (LxWxH): 147mm x 101.6mm x 26.1mm Weight: 0.72kgs Model Number: WD4003FFBX Operating Temperature: 0°C to 65°C Non-Operating Temperature: -40°C to 70°C Certifications: BSMI, ICES-003/NMB-003, CE, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB-Scheme, TUV, UL Product Features: Ideal for creative professionals, medium to large businesses, and commercial/enterprise NAS systems. Designed for multi-bay RAID-optimized NAS systems. 550TB/year workload rate and up to 2.5 million hours MTBF. Compatibility: Multi-bay RAID-optimized NAS systems. Model Number: 4 TB, 256 MB: WD4003FFBX This is a set of 2 units. The products are in their original unopened bags. We will ship your order with a tracking number within 1-3 business days after confirming your payment. Please Note: that if there are any discrepancies between the written description and the information shown in the photos, the information presented in the photos should be considered accurate. The above description was created by AI. Since the information may be incorrect, please check the official website yourself for accurate information. 1. What is included in this item is only what is shown in the picture. Please note that batteries and other items not shown in the picture are not included. 2. Import duties, taxes, VAT (Value Added Tax), and other charges are not included in the item price or shipping cost. These costs are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. 3. Return policies are according to Catawiki's terms. Thank you.