Have 2 of them. One has a drum cache and one doesn't. They have different controllers and nand flash. The maximum read speed of one of the hard drives is 1 MB/s. It's good enough for my use, but Def is an odd surprise. If yours is as slow as mine, I'm sorry.
Seagate FireCuda 530 4TB SSD: High-Speed 7300 MB/s Transfer, PCIe Gen4 Γ4 NVMe 1.4, 3D TLC NAND, 5100 TBW, 1.8M MTBF, 3-Year Rescue Services
5 Review
π₯ 2TB TEAMGROUP T-FORCE CARDEA ZERO Z330 SSD with SLC Cache, Graphene Copper Foil, 3D NAND TLC, NVMe PCIe Gen3 x4, M.2 2280, Gaming Internal Drive, Read/Write Speeds of 2,100/1,600 MB/s, for Laptop & Desktop TM8FP8002T0C311
8 Review
π¨ Lexar NQ100 240GB SSD: Speed Up Your Device with SATA III Internal Solid State Drive
5 Review
Kingston NV1 500G SSD: High-Speed M.2 2280 π₯ NVMe PCIe Internal Storage, Up to 2100 MB/s - SNVS/500G
16 Review
π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
60 Review
18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review
Game console Microsoft Xbox One X 1000 GB HDD, black
53 Review