I have a Qnap TS-451A NAS that I bought many years ago. I spent months setting up RAID 5 of 4 drives. Changed discs several times, always the ones listed as compatible. During those months I had to replace drives 3 and 4 no matter what drive I put in there, forcing me to rebuild the RAID. I gave up and have been using it with a drive ever since. I love the applications you can run, especially for me as an IoT developer. I recently bought an Asustor AS6604T NAS. Upgrade it to 12GB RAM, put 4 HDDs on it, turn it on and it will create RAID 5 automatically. It just worked. I'm in the process of migrating my Docker container to Asustor. It's a lot faster than Qnap, partly because it has the latest hardware. Structurally it is well built. I love it!
2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review
18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review
π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
60 Review