WD Red SA500 NAS SATA SSD. Global - 2.5"/7mm cased. Boost your NAS systems performance and responsiveness with the WD Red SA500 NAS SATA SSD. Since your NAS system is always on, a reliable drive is essential. Unlike standard SSDs, WD Red NAS SATA SSDs are specifically designed and tested for 24/7 usage. This durability together with efficient caching of big files make these drives ideal for OLTP databases, multi-user environments, photo rendering, 4k and 8k video editing and other demanding applications. With 2.5" and M.2 form factors and capacities from 500GB up to 4TB (2.5" only), the WD Red SA500 NAS SATA SSD lets you optimize your existing or next NAS system for superior performance and endurance.