Hey @Aj78, thanks for joining our Community.
With a 2 or 3 TB plan, you can store as many files as you want, up to 2 or 3 TB.
If you're using the Dropbox desktop app, files are also saved to your hard drive space, so you'll need to have that in mind as well.
However, we do offer features that help you free up hard drive space too.
I hope this helps, but let me know if you have other questions.