MAIWO 4 Bay Hard Drive Enclosure for 3.5'' SATA HDD with Two Fans,4 Bay HDD Enclosure with 4K HD-MI Port, 96TB Expansion,Independent Hard Drive Power Switch

Review for Maiwo K35274A 4-bay 3.5" SATA hard drive external USB 3.1 4K HDMI non-RAID enclosure.Box includes enclosure, external power supply and outlet cord, 2 USB cables (1 for if you prefer USB-A, 1 for if you prefer USB-C), 27 screws, a properly fitting magnetic screwdriver, and a bare-bones user manual. Actually bought 2 enclosures, one for expanded hard drive capacity, and one for all backups. In each, I installed 4 fairly new partially filled Seagate EXOS 20TB ST20000NM007D hard drives. My Windows 11 Lenovo laptop easily saw them, without me doing anything special, and can write and read with them. The 4×20TB simultaneously appear about 1.5 minutes after enclosure power on, in series, so 2 takes 3 minutes total. If I reboot and want my last session's Windows Explorer windows restored, I need to turn the enclosures on and wait an extra 3 minutes before logging in.Switches are basically identical and close together, making it easy to accidentally switch on/off the 2nd hard drive, fans, or enclosure when trying to do it by feel alone. Fortunately, that's rare.Been using them for 2 months. They're not giving any drive not found errors, although, if they need to wake up, there's a 2 second delay. No problem bulk copying 4.36 TB between a drive in the first enclosure and a drive in the second enclosure, which took 6 hours through USB 3.1. Did a dozen 1-3 TB copies/moves, without any problems. Seeded torrents several weeks, without any problems.Fans' noise is about the same as my laptop's fan's noise; for home use, you may want a sound barrier. Love its sturdy unmovable handle for carrying my backup set of hard drives to a different location ... although, for disaster contingency, I always want the power supply and cables with it, so I would have preferred an internal power supply. Good rubber-ish feet.Note on a return/repurchase: Rather than navigate a warranty with the end of the return window fast approaching, I returned 1 enclosure and purchased 1 as a replacement, so I'm keeping a total of 2. On the returned one, its fan had a slight buzz for hours, and would repeat this every 1+ days. Flipping the fan speed switch only altered the buzz's pitch. Thought the user screws could be loose, so I reopened it and tightened all user screws, but the problem intermittently reoccurred. Also, at times, it had a slight hum, which would stop while I touched it. Also, 2 screws had burrs that chewed up some of my hard drives' threaded holes, creating a few metal shards ... hopefully shards that fell into the holes won't damage my hard drives' circuit boards.Note on hard drives: After buying dozens of hard drives over decades, I learned that most "internal" hard drives are made to withstand heavy use (like an operating system boot drive), while "backup" hard drives are made to withstand only infrequent use (like a weekly incremental backup). 10% of a hard drive's existence, I'm torrenting with it, and maybe 4 of 12 "backup" hard drives died after just a few years of use, and 1 of 14 "internal" hard drives died after many years of use. Personally, I decided to stop buying "backup"-quality hard drives. For extra peace-of-mind, I recently decided to buy only enterprise-quality internal hard drives and buy an enclosure like this. After weighing the pros and cons of RAID, I almost went with it, but decided against it for personal use ... I worried that I might not be able to get my data from it if it had a controller board failure, and software-based RAID didn't seem too appealing.