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The Oyen Digital U34 Bolt is a 4TB external NVMe SSD in a bus-powered aluminum enclosure. It uses a PCIe Gen4 x4 drive behind a USB4 40Gbps interface, rated at up to 2,800 MB/s read and write. That puts it in the top tier of portable drives, well ahead of 10Gbps USB 3.2 drives and roughly level with other USB4 enclosures. It suits video editors, photographers and anyone moving very large files between USB4 or Thunderbolt machines. Buyers should check their port: on older USB or Thunderbolt 3 systems it runs slower, and it needs USB4 or Thunderbolt 4 to hit its rated speed.
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Lowest price we've seen: $949.00 on Nov 10 at Newegg. Tracked across 2 stores since Nov 10.
Owner feedback on Oyen Digital's USB4 portable SSDs is generally positive, with buyers reporting near-rated speeds on USB4 and Thunderbolt 4 hosts and solid aluminum build. Complaints center on heat during long transfers and on speed dropping sharply on older ports.