I use dropbox to 1) make a secure backup of my files and 2) share files with collaborators. I won't be using dropbox any more as soon as i find a replacement. I had chosen to store all of my dropbox/shared files on my hard drive in addition to in the cloud on dropbox.com for 2 reasons: 1) so i can access my files when i don't have stable internet and 2) so that i have my own copy of the files that i expected would be free from dropbox meddling. How wrong i was. About 3 weeks ago, I noticed some of my (thousands) of shared files were no longer syncing with collaborators. It took me a week before the its-all-something-you-did "support" at dropbox actually connected me to tech support. That's a frustrating week where productivity was greatly reduced by having to manually email files back and forth. Then, finally with dropbox "support" instructions, they had me reconnect to dropbox, which initially caused dropbox to re-sync my entire dropbox - thousands of files (~350GB), the vast majority of which have been untouched for years and had recently been existing just fine on my hard drive and in dropbox cloud storage. This un-necessary re-syncing was taking days on a metered internet connection. Dropbox then instructed me to re-install with a stable version of the app that they provided, assuring me that would stop the unnecessary re-sync of hundreds of gigs of files. I did that, and dropbox deleted my files FROM MY HARD DRIVE!!! Now they have again instructed me on signing out and re-connecting dropbox, which has caused dropbox to simply hang, unconnected, with all my files hostage in the cloud, if they even exist. Support flat out refuses to call me or screen share, but instead, every couple days offers a piece of "advice" that only worsens the problem. I see dropbox going out of business soon with their product that is more of a liability than benefit and a complete disregard for customer service of any type.