Looks like some kind of Photos, Cloud Photos or a Third-party Photos process.
I suspect that it is from a third-party photos app, because a search of tsphotoctil came up empty.
Most times, that activity will eventually sub-side once the process has completed syncing or updating.
Plus it is better to allow that activity to complete, instead of trying to stop or force quit the process.
To help find out what that process is,
Download and run the free version of EtreCheckPro, from > https://etrecheck.com/en/index.html
Then port the Report, as per > How to use the Add Text Feature When Post… - Apple Community