Absolutely. One mailadress per service. Once a year or so i cycle through everything and delete accounts i don’t need/want. I contact the services that don’t offer deletion of my data directly. I like to think that the little things count.

“If nothing we do matters - then all that matters is what we do.”

I have an external Usb Dock that i connect to a PC and run a Wiper. Depending on the size it takes quite a while. Maythe there is a wipe function built into your NAS.