01-25-2021, 03:24 PM
DS1621+ and DS1821+ are the same NAS with different bay count. If you need more storage space you may go for more bays. Or if you are not sure about the future, you can choose 8 bays but put in only 6 drive. So you can expand later or have SSD aditional RAID.More drive also mean better performance and speeds. This is something useful when considering 10GbE.Both of these models can be upgraded with 10G card.Here is a difference :https://www.synology.com/en-uk/products/compare/DS1621+/DS1821+I hope this elps.