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Samsung T5 portable SSD - Slow: only getting 350 MB/s when transferring files via Thunderbolt 3 port

Windows 10

Lenovo Yoga 15 with Thunderbolt 3 port


When transferring files from the laptop's NVME harddrive to the T5 hooked up to the Thunderbolt 3 port, I'm only getting 350 MB/s transfer speed.


But when using Anvil Benchmark harddrive speed test, the drive tests fine at R/W 500/455 MB/s.


What gives?