I have text in a frame with a table in it, connected to a Word file. Every time I try to copy text in it, InDesign goes into a loop while it refers back to the original file. It does it a bunch of times, I assume (but don't know) once for every row in the table. The loop takes three or four minutes to complete and there's nothing I can do until it's finished... I want to break that link and just have it as a normal text box, rather than a placed one. How do I do that?
See, this is what you get. Never do such things, even if they are possible. Adobe and MS never worked harmonically and that won't change.
Copy and paste the table, then the connection is broken.
Try to turn off create link when placing text and spreadsheet files from preferences>file handling.
Also from links panel flyout select unlink.
To answer your question -- to break the link between a text frame and the original linked file, select the name of the linked file in the Links panel and then select Unlink from the Links panel's flyout menu (accessed near the Panel's upper rlght corner).