Biggest Feature Home Base 3 offers compared to Home Base 2 is option to add SSD Hard Drive and it works with list of exisitng eufy cameras
Expandable Local Storage: With eufyCam 3C, you're in control of your own data with advanced encryption. Start with 16GB of inbuilt storage, and if that’s not enough, install a hard drive (not included) to expand to up to 16TB of storage, all for no monthly fee.
This is tempting but I wish I could trade in my homebase2