I'm on Sharepoint Online, and I have a document library of about 1600 files. I have about 1000 files that are Unassigned in a certain column that I want to change from Unassigned to some other category. I tried selecting all the files with Ctrl-A and using the bulk edit properties tool to change the Project column, and then I click Save, but the saving never finishes (I waited overnight for this, just in case), and when I check on the document library with a new tab, nothing seems to have actually changed. Is there a reason why bulk edit properties isn't working, and is there a better way to do it?
Per my test in my SharePoint online, in the modern document library, I select bulk files and use the bulk edit properties to edit the properties of the files.
And it can work.
I suppose you select too many files to edit the properties.
I suggest you could select about 100 files to edit the properties of the bulk files.