I have 3 files that are set up exactly the same, just each file used for a
different group of people. All files in the region of 9000kb. Recently the
one file started climbing to over 15000kb & takes a long time to open. I
created a new file, with all the same data. Saved regularly and it was
9000kb. Immediately after saving, closed the file - and it had jumped to
16000kb.