The HGST 500GB HTS545050A7E680 is a 5400rpm internal hard drive that comes in an external USB3.0 case, making it compatible with laptops, PCs, and Macs. This drive offers fast read speeds of up to 500MB/s and a transfer rate of up to 300 Mbps. It features a cache of 8 MB and a storage capacity of 500GB, providing ample space for storing files and data. The drive has been erased and surface scanned for errors with no errors found. This drive is formatted exFAT for compatibility with various operating systems. The drive can be removed from the case if you want to use this drive internally.