The OS is on a SD card, the HDD is a spinning disc connected via USB and I actually never had any issues with its connectivity.

There are however issues sometimes if I connect a second drive, where I assume it does have something to do with not getting enough power for 2 external HDDs, but I only ever connect a second drive for backing up.

Don’t think this is connected, but if more people here feel like yes then I am happy to check in that direction.