How can I download all my PMs at once?

I was wondering how I can download all my PMs at once? When I tried the "Download all Private Messages as: txt" link, it saved only one page of messages rather than all. I tried selecting all messages and then choosing "download as text" from the drop down menu but that didn't work either. Any help would be appreciated, thanks!

 

I download them as "txt" all the time. It's all one file, and the messages come one after the other. They don't appear as separate pages, just batched together.

 

You are right TikTok, at first I thought it was saving just one page because I expected it to be much longer, but when I searched for the first and the last message received, both were there Thanks for your help!