What is Reddit's opinion of Alxum USB Type-C SATA Hard Drive Docking Station, USB C Hard Drive Duplicator with Offline Clone Function for Dual 2.5 3.5 Inch SATA HDD SSD up to 2 x 18TB Drives, Tool-Free & UASP Supported?

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hmm...talking bladebit.

Using either Samsung 970 Pro NVME 1TB (high sustained consistent write speed around 1400MB/s via Thunderbolt 3 Enclosure) OR Samsung 970 EVO Plus NVME 2TB (also high sustained consistent write speed around 1400MB/s via Thunderbolt 3 Enclosure).

Samsung 970 Pro would have much higher sustained consistent Write speed than Samsung 970 EVO Plus without Thunderbolt 3 enclosure (around 2400 MB/s) but for MacBook we don't have any choice but stick NVME in Thunderbolt 3 Enclosure (Sabrent in my case). But given the Thunderbolt 3 enclosure as a bottleneck to achieve 2400 MBs/s...kinda leaves out the write speed. So I switched to 2x cheaper Samsung 970 EVO Plus nvme.

Writing on the 'final destination' (during Phase 3 in bladebit) is a part of plot creation so you have to factor it and this will slow down the plotting via bladebit (it did in my case). So I had to stick my HDD (for final destination) to a SATA HDD Docking Station which boosted my plotting time for bladebit from 60+ to 46 mins.

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UPD: now I use SSD (to shave another 6-7 mins off to 37-38 mins) as a final destination and some good man advised to use a simple 'while loop' command (to run in terminal) to automatically transfer plots from SSD to HDD. But this transfer happens after plot is created so it kinda happens in parallel and does not impact plot creation time.

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UPD#2: testing SSD RAID0 to shave few more mins for Phase 1. But honestly with all the investments it would be more reasonable to buy a Dell Workstation or server (with 2x CPU and 500_GB of RAM) for RAM plotting via bladebit...10ish mins I reckon. So I am on a fence. Don't want to run another machine.

Hope this helps.

This is what I’m using instead.

https://www.amazon.co.uk/dp/B07SH65FXT/ref=cm_sw_em_r_mt_dp_57PQWZ6QGADHJJJXDQ5E?_encoding=UTF8&psc=1

I got the USB C variant. Hope it helps.