@giambu wrote:
... in 1 hour I'll need to switch the pc off. Will I be able to do that and continue tomorrow or another day?
If you're syncing files using the Dropbox application installed on your computer, then yes, you can shutdown your computer and Dropbox will continue to sync the next time you turn it on and Dropbox is started.
If you're uploading files to Dropbox.com in your web browser, then no, the files will not resume uploading later. You would need to start them over again.