how to convert .BAK file into mp3. file

[francesco-orsi99]

how to convert .BAK file into mp3. file
I tried to use audacity but it doesn't support this type of file.
Is it normal that the file is a .BAK?
How can I solve this problem??

[musikbear]

I can see that you are new in our forum, so-
Welcome to the forum francesco-orsi99! Here, For you, all important links:
http://lmms.io/forum/viewtopic.php?f=1&t=4740
And a few rules for posting and using the right sub-forum :)

how to convert .BAK file into mp3. file

a .bak-file is a backup-file for your lmms-project-file. That cant be converted to mp3.
What you need to do, is to export
https://lmms.io/wiki/index.php?title=Exporting_the_Song
-your project to preferably wave, which is lossless, and in Audacity you can then 'convert' (save as) that soundfile to the mp3-soundfile format.