If you leave it set to the settings in the screenshot, the max it’ll take up is 10.8GB

Yeah, it works well and haven’t noticed any type of performance impact.

Sounds to me like your IP changed and your A record isn’t pointing to the proper IP anymore.

Sync for Lemmy does.

The app is free with optional upgrades

I use 192.168.x.x:port_number to access it

What IP is the machine?

Try using the ip_address:4666

This