I'll say in advance that:
1) I don't have Steam installed into the default Program Files directory of C:, because it is saved in a custom Games directory of another drive [and disk] (E:).
2) Take ownership doesn't do the trick, so the issue isn't with directory writing access privileges, but it's truly an issue with the Creation Kit.
I am worried that it could negatively affect my mod.
Moreover, if I use the other option (Upload to Steam) and I halt it before the actual uploading:
1) It does save into the Data folder and renames the BSA with the appropriate name (same as the esp).
2) It doesn't seem to update the file if another BSA is there.
Now...I'd like to understand why the behaviour of the CK differs in a thing (packing archive) which should be the same and, more important, why files which are conceived to stay into the Data directory aren't saved there by the CK even if this is asked to the program.
Jashkar

