I've been using Dropbox for about 10 years and store ALL my data (documents, photos, everything...) and was super organized.
My laptop (Macbook Pro) crashed last night. I took it to be repaired today and the guy fixing it had to restore it and update the software, however, he managed to keep all my data on my laptop which is great. So I turn it on and it's back to normal apart from a few apps which I've had to re-install.
I went into my Dropbox file via the website and was shocked as most of my files are empty.
I realized I had to re-install Dropbox on my laptop so I did this thinking this may be the problem but it's not.