Yeah, it's a good way to do it. I still rather use external. That way if anything corrupts my internal drives or my GPU plug lights on fire (like the horror stories I've been hearing about some of the newer GPUs) then at least my personal files are saved and completely separate.
As a bonus, I have it in a fireproof safe. Hopefully its insulated enough where it won't heat the drive up too much if I ever had a fire in my apartment.
My gf still uses the toilet paper roll/dryer sheet trick. The whole apartment smokes, but she likes to be discreet and respectful. She used to also burn incense, but I think the massive amount of incense she's burned during our time together has made me allergic. Every time I'm near one my throat gets narrow, my eyes water, and I can't stop coughing.
About a week ago I forgot my pipe so I took my brother-in-law's knife, dented a beer can, and stuck holes in it. Gen Z can hit that pen all they want, but I'll be the one still getting high when the apocalypse hits. These are not tricks. These are key survival tactics.