So I have 5.5 GB on Dropbox but my Aire shows I am using 7.87 GB on my hard drive. What is that discrepancy because it is the same set of folders as on Dropbox web site. I check it on the mac by right clicking dropbox in finder and viewing Get Info? What gives? clarification: using 4.3 of 5.5 on actual web site but showing 7.87 on Mac drive. I uninstalled and reinstalled Dropbox and it now reads 8.51 GB on my hard drive while still using just 4.3 of 5.5 on the website.