[tmihai20]

Any recommendations on which USB stick to use and what size in GBs?

I would recommend a USB3 stick like this one KINGSTON DataTraveler R3.0 G2. I have the 64 GB version for my own use and a 16 GB for work and it absolutely flies. I mean it one of the best USB sticks I ever had I think the 32 GB version has the best price.

Have you installed LibreELEC on your KINGSTON DataTraveler R3.0 G2, is the performance OK?

Will the performance be OK in a USB 2.0 socket?

I have not used it with LE installation at all. I have used my 16 GB stick extensively at work with dozens to almost 100 write/read and it never failed. I would use one if I had to. It is not all about maximum write speed, I want it to be reliable. I does get a little hot while being used, but I do not see it as a big issue. Only people that are using them to install LE can say. You can disregard my advice, I am pretty happy with my TV box and I believe I cannot use LE on it anyway. The only issue could be the heating, I would go with a microSD card that I could carry inside a wallet.