so, still i did not understand it completely but just want to share the
thought to help you here. If you are working in any activities in Target
you can intermittently save any modification by saving as draft or
similar, refer below image. Now if you are not saving those modification
and jumping to any other activities or doing something else before save,
you will loose those. Target doesn't remove anything saved by its own
side. i hope to clarifies you question.