I bought two of these devices. One replaced five 3TB WD Red drives pulled from a Sans Digital 5-bay hardware raid, and all ended up with data intact. I formatted the data anyway and copied it back. Lots of videos. It went from 150Mbps to 200Mbps according to Windows 10's file transfer. Another replaced the four-bay Sans Digital Tower, and all the data from the WD Red 5TB drives popped up right away. So I like that it's interchangeable with my Sans Digital towers. Both units are compatible with Sans Digital software and even have a mute/mute buzzer feature which didn't work with my Sans Digital towers. I was able to destroy the raid 5 and add another WD Red 5TB to get all 5TB in the raid 5. I used Sans Digital's software to destroy and rebuild the raid, so I didn't try to set the dip switches, although they are set to Raid 5 on Sans Digital, they each ran at 100-130Mbps or so when copied to disk. In these kits they are 150-200 Mb / s - noticeably faster. I am very happy with the performance, build quality and especially the compatibility with Sans Digital Raid interchangeability in case one of my towers fails and I need to replace to save data. Sans Digital is hard to come by and I assume they have been discontinued. Not sure as I only recently discovered these and could only find them in stock at Revain, although they were out of stock and are back and out of stock as of this review.
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