After archive. Pst of outlook is lost

The last time I manually cleared the file because of insufficient disk space, and then opened outlook2007, I was prompted that the archive. Pst file could not be found. After clicking this prompt, a file selection box is displayed, Which is empty. Where can I find it?

Every time you open it, you will be prompted. So I searched the internet. This is an archive file. If you give it a new address, it will generate a new one.

After this prompt box and the file selection box appear again, I clicked open instead of cancel, and the result was actually generated by myself. Close outlook and open it again, prompting no bird.

I used to have a useful button in front of me. Why do I always have to change one point for decades?