Synology DiskStation DS220+ 2-Bay NAS Enclosure

The Synology DiskStation DS220+ 2-Bay NAS Enclosure uses trays and would not need anything else to connect 3.5" drives.

No, the Synology DiskStation DS220+ 2-Bay NAS Enclosure BH #SYDS220P does not have a video output or supports a USB to HDMI converter. I would recommend looking into a QNAP NAS, a lot of their NAS models do have built in HDMI outputs. The QNAP TS-253D 2-Bay NAS Enclosure BH #QNTS253D4GUS is a good option.

The Synology DiskStation DS220+ 2-Bay NAS Enclosure is meant to connect to to the network and not directly to a computer. The USB ports on the unit are meant to connect to additional drives to expand your storage. Link aggregation is meant to utilize both ports where one is used for downlink and one for uplink. This is actually a very simple to use NAS unit.

Visit the Synology Compatibility List for tested models. Some models not listed may work, but it's best to use something from the list. https://www.synology.com/en-us/compatibility?search_by=products&model=DS220%2B&category=hdds_no_ssd_trim&filter_brand=Samsung&p=1&change_log_p=1 Cheers, Fred

Synology does not support Roku.

Yes, you can use the BH #WES100T1R0A with the Synology DiskStation DS220+ 2-Bay NAS Enclosure BH #SYDS220P.

The DiskStation DS220 requires a wired Ethernet connection to your local network, but you can access it from devices connected to the local network via WiFi.

The answer to "how many" is 2 because it's a 2-bay drive. I have mine set up in RAID 1, so there the 2 drives are mirrored. If one fails, I still have the other one is the thinking. This is highly recommended. The NAS will send you a health report each month and notify you if a drive begins to fail. It will happen one day as a spinning hard drive will not last forever. I had a DS215j and the drives lasted 5 years before starting to fail. I went ahead and upgraded to the DS220+ at the same time and it is light years ahead of that older machine. If you meant "how much space" instead, that depends on what else you're using the NAS for besides a Time Machine drive and how large are your hard drives on your Macs. A rule of thumb is to have your TM drive between 1 and 2 times the size of the Mac's hard drive. This will allow plenty of room for many incremental backups and you'll have many versions of changing files and a greater chance of finding a deleted file that you didn't know got deleted until many months later. If you don't care about that, you can look at the storage space you're using plus about 50% and go with that. I use mine mainly for Surveillance Station and I have all of my photos, music, and movies stored on it. I was using my NAS to do TM backups for a while but I switched back to using a portable hard drive. It's not that essential to back up daily since I also use iCloud. We have two MacBooks and an iMac here. What's important is to set up the NAS in the beginning to use the BTRFS file system so that you can set quotas for each user. You really want a quota because otherwise, macOS will eventually use up much more space than is necessary. Alternatively, like another person pointed out in their answer, you can set up a partition on the NAS hard drives that is the size you need and then set a quota for that volume. Synology has instructions on their website to set up Time Machine here: https://www.synology.com/en-us/knowledgebase/DSM/tutorial/Backup/How_to_back_up_files_from_Mac_to_Synology_NAS_with_Time_Machine#QUZDgW3T1Y