For example, for our portable version of LibreOffice, the user profile folder is at C:\Users\Lori\Documents\Portable Software\LibreOffice\Data\settings\user. If you’re running a portable version of LibreOffice on Windows, the user profile folder is located in the \Data\settings\user folder in the folder where you installed the program. Now, you can go to your user profile folder in File (or Windows) Explorer and back it up to an external drive, network drive, or cloud service.
NOTE: You need to show hidden files and folders to be able to access your LibreOffice user profile folder.