SanDisk Professional PRO-G40 Portable SSD 4TB. Used but works flawlessly!

SanDisk Professional PRO-G40 Portable SSD. Specifically, model SDPS31H-004T denotes the high-capacity 4TB variation of this ultra-rugged external drive.Technical Thunderbolt 3 (40Gbps) & USB 3.2 Gen 2 (10Gbps)Connector TypeUSB-CMax Read SpeedUp to 3,000 MB/s (via Thunderbolt 3)Max Write SpeedUp to 2,500 MB/s (via Thunderbolt 3)USB-C SpeedUp to 1,050 MB/s Read / 1,000 MB/s WriteDurability RatingIP68 dust and water resistanceCrush ResistanceUp to 4,000 lbsDrop ProtectionUp to 3 meters (9.8 feet)CoolingInternal aluminum core for optimal thermal managementKey FeaturesDual-Mode Flexibility: Unlike many Thunderbolt-only drives, it operates at full speed on Thunderbolt 3/4 ports while remaining fully backward compatible with standard USB-C ports at standard USB speeds.Enterprise-Class Ruggedness: Designed for extreme field environments, it withstands heavy crushing forces, complete immersion in water, and high drops without losing data.Sustained Performance: The interior aluminum core acts as a heatsink, keeping the drive cool to prevent thermal throttling during heavy data ingestion or high-resolution video editing.