Don't call it "new"! But calling it "old" is OK.

Have you ever seen a directory with files names like this?

Which is the current one and which are older working copies?

The super organised person would name the files like this:

For the rest, let me recommend calling the files "old" as you have no trouble picking out the latest version here:















Of course that means you need to save the changes in 2 steps. You will have to save the new version of the document under a temporary name close the document, go to the explorer and rename 2 files. The effort is worth it!