Is your "C:\" drive partitioned? How much space is available?
Hint: Open Windows Explorer, right click on Local Disk (C:) and select properties.
Even if you try to save to some other drive, the system still stores all your data to your user temp directory first. Then the individual part files are compressed and merged into one file.
By default, your temp directory is on the C: drive.
It is not possible to save a drawing as part of a package, so of course you would get an error when trying to save a drawing, then the package data would save.
I'm trying to save the annotation as it's called as a bundle [the default] and it says there isn't enough disk space :
"Cannot store file C:/Documents and Settings/..../My Documents/Work/Drawings/t.bd2. Please check if there is enough disk space."
Drive "C:\" has 218Gb free, same response if I use drive "D:\" whihc has 465 Gb free.
As I have stated eariler, I have full admin rights on all drives, folders and files so it's either registry based, OR the drawing save function is disabled in Creo Elements Direct Modelling Express 4.0 and Creo Elements Direct Modeling Personal Edition 3.0 (English).
Many thanks for your efforts.