So I've ran out of internal SATA ports and power ports, but plenty of spare USB ports, is it bad if i just use external drives permanently connected to USB and treat them as storage drive, they are just spinners not SSD ?
Any issues long term? What if programs and games are installed to it?
Only thing I can think of is ransomware having access to it if you ever get infected, your chosen AV doesn't save you and it's been awhile since your last backup/s.
If it's not your main drive, it will mostly be idle.