PlayerPro Music Player

Greetings to the forum. Newbie here. I subscribed to Player Pro and installed it on a Android 8.0 head unit in my car. No problems, all works fine and sounds good but I created a play list of over 200 songs which are downloads off Youtube through a MP3 converter. I have them all on a USB stick and I manually numbered them all in sequence 01 to 10 and 11 to 20 and so on. When installed onto Player Pro the new play list appears OK and I select "Sort by file name" expecting them to play in numerical sequence. 01 to 10 will play OK then after 10 the app chooses 100 as the next then 101 and so on.

What is the correct way to re number everything so it plays in the sequence I want ?

Thanks. Buster.