SanDisk SD9SN8W-256G-1002 - 256GB M.2 2280 SATA III NGFF Solid State SSD
Portable SSD] SanDisk Extreme Portable SSD 250 GB, on clearance as low as $17 in store only, YMMV : r/buildapcsales
WD elements 10tb makes a repeated clicking noise like a heartbeat but strong every 5 seconds while it's idle and working - External Drives for PC - WD Community