Memory upgrade

[ed]

Any drives will work with a two-bay NAS. It is recommended to go for WD RED plus or Ironwolf though. But Barracuda drives will be cheaper and are OK for mirroring.
https://amzn.to/3Ikfb3T

Here is DDR3 RAM that works - max 4 GB
4GB Computer memory DDR3 for Synology DiskStation DS713+ RAM SO DIMM
The 4GB DDR3 SO DIMM memory RAM is 100% compatible with Synology Storage/NAS.
Size: 4GB
Type: DDR3 SO DIMM more

https://amzn.to/3ImhzHo