Like issues with uptime, risk of backdoors, privacy concerns, etc.?
Using Raspberrian Bookworm, input connection is through an ethernet cable and the hostpot was set up through Pi-Apps’ hotspot tool and is using WSA2 and password, but nothing else to note.
Not much info I could find through articles online.
A hard drive might be fine, but take into account the limited capabilities of the Pi’s power supply. Yours may not be able to support an external HDD unless your enclosure is powered separately. And of course that HDD will be slower than a MicroSD and much, much slower than a SSD.