In general, I think avoiding either My or Your is better. However, there could be situations in the UI that you may want to separate My Stuff vs Other's Stuff.

In general, I think avoiding either My or Your is better. However, there could be situations in the UI that you may want to separate My Stuff vs Other's Stuff. E.g. a shared folder with a header "My Files" vs "Others". In this case, I think using "My" is stronger. There other other cases like "Your files have been fetched" that sounds more right. I think in general, if you are labeling something, My is ok. If you are communicating a message (e.g. through a notification), Your is better.