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I know that in ACAD you can use the xref manager to see where the actual file for the xref resides on your computer/server/etc. What I'm curious about is whether or not the inverse action is possible. Can you somehow access the file (not the output sheet where it's being xref-ed) and see what other files are using it as an xref? I've come in on a project that is nearing completion and have been assigned the task of "cleaning up the project folder." Unfortunately, there are a ton of files in the different folders that are no longer in use on the final output sheets and I need to keep the ones still in use and archive the ones that are no longer needed. What I've been doing is going through those sheets and reviewing the xref manager for each sheet to see which files are actually put onto those sheets and making a physical checklist from which to organize my findings. Once the checklist is made, I then archive all the files that are no longer being used. Just wondering if there is a better method to this madness! Thanks for your time!