I have an excel doc that is full of data called source.xlsm. I have a number of other Excel docs (lets call one myfile.xlsm) that link to the data in source.xlsm. I linked to it via Data > GetData > FromFile > FromWorkbook then choosing the relevant table or sheet. All of the files are on a shared NAS drive. If both myfile.xlsm and source.xlsm are open on the same computer, all is right with the world. I can open, update, save as I choose with one or both of them open. However, if I open source.xlsm on one computer and myfile.xlsm is open on another computer, I cannot save source.xslm. It says it is being used by another user. It is not open anywhere, just being linked to for its data. If they're both on the same computer, then they're both fine to save at the same time. Is there a way around this as I want user to be able to open the various myfile.xlsm but I also want to be able to update the source.xlsm at the same time. Nobody else need open source.xlsm, just continue to use workbooks the link to it. I though that should be possible as the other user hasnt opened the file and the link is passive so the source file should not be locked?