The downloadable Dropbox desktop application—also known as the desktop client—runs on Windows, Mac, or Linux operating systems and gives you access to your Dropbox directly through a folder on your hard drive. (Visit this article instead if you are running Windows 10 in S mode)
In addition to using dropbox.com to access and share your files, we recommend that you download and install the Dropbox desktop app to get the most out of Dropbox.
Using Dropbox on your computer is just like using any other folder on your hard drive, except the files you drag into your Dropbox folder automatically sync online and to any other computers or mobile devices linked to your account. The app runs in the background and automatically keeps your files in sync and backed up online. It's like having the same folder on all of your computers and mobile devices at the same time.
Using the desktop app means you won't have to manually upload or download files in your Dropbox folder. The app automatically watches your Dropbox folder and keeps your files in sync for you. Any time you save a change to a file and are connected to the internet, that change will sync everywhere you have Dropbox installed.
The desktop app even works when you're offline. The next time you're online, Dropbox will sync changes just where it left off.
Dropbox Business users
Need to access your personal and work Dropbox accounts from the same computer? Find out how to connect them. On a computer, a personal Dropbox and work Dropbox look like two separate folders, and you can use these folders like you would any other folder on your computer. The work Dropbox will display your company's name so that you can tell the folders apart.