Power failure during core update, location of temp files?

I had a power failure while updating my core. The system seems fine but I am unable to restart the core update because I don’t have enough disk space available.

Where are the previous update files located so I can delete them to free up disk space?

I’m running on a raspberry pi (core: 2022.4.5, OS: 7.6).

I’d check in your config folder for previous log files you can delete, and also copies of corrupt database files.