How I relink assets if I chose to alter the location of the file ?

I am trying to limit the amount of data I have in a project and I want to remove anything I don’t need or use, I am also trying to simplify the amount of folders I have because I seem to have content folders within content folders and blueprint folders in several places because I’ve been importing some from other projects etc…

How do I relink an asset or BP to its new location when I open the level and it tells me something is missing ?