You can install FL Studio to an external drive, but it will still write registry entries on each PC you plug into. It works, but not truly portable.
If you own the Producer Edition or higher, you are legally allowed to install FL Studio on multiple machines, as long as you only use one at a time. download fl studio portable better
Here is the "Better" workflow:
Why this is better: You open your laptop at a friend's house, log into your Cloud drive, and everything is there. No missing samples. No registry errors. You can install FL Studio to an external
Don't download "FL Studio Portable" from untrusted sites. Why this is better: You open your laptop
This is safer, legal, and you won't lose your work to a corrupted portable repack.
If budget is the issue, look at LMMS (free, open‑source, truly portable) or Cakewalk by BandLab (free, requires install).