The WD Purple 4TB 3.5" Surveillance Hard Drive (WD40PURZ) by Western Digital is a reliable internal desktop drive designed for use with PCs. With a rotation speed of 5400 RPM and a storage capacity of 4TB, this HDD offers fast read speeds of up to 500MB/s. The drive is compatible with SATA interfaces and features a low noise level, making it ideal for use in surveillance systems. The purple colour and compact 3.5-inch form factor add to its appeal as a practical and efficient storage solution for various desktop applications. Pulled from a NAS project and in good working condition