I’ve used it for the exact same purpose, great minds think alike. It’s perfect for that scenario given there’s no internet.
I just don’t use it much otherwise because apps like Signal are far easier to move my friends and family on to and they’re more than good enough. The metadata privacy Tor would provide would give me a lot of peace of mind but I know it’ll never happen.
Yeah, I’ve filled 256GB pretty easily by recording on an action camera all day, maybe for a couple of days. 4TB would be very convenient for a holiday.