Yes, you need a Dropbox account to join a shared folder. Files in a shared folder sync between members in their Dropbox accounts, so you need a Dropbox account to access and sync changes.
If you invite someone without a Dropbox account to a shared folder, they will need to create an account to join the folder.
If you don’t have a Dropbox account, you can:
- Create a Dropbox account for free and then accept the invite
- Ask the person who invited you to share a link to the folder, rather than adding you as a member
Can I receive shared files when I don’t have a Dropbox account?
You don’t need a Dropbox account to view the files in a shared link, and you can download those files to your computer. Files that you download from a shared link won’t sync with Dropbox if you edit them.
Can I upload files to Dropbox without a Dropbox account?