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If not, then it’s an indication that the problem lies in your internet connection, not in Dropbox.
So, check whether you are able to browse different websites on the internet.
You need to have an active internet connection so that Dropbox can easily sync data.
Files that Dropbox has flagged as copyright violations, DMCA violations, or malware/virus. Temporary files created by applications (such as Microsoft Word, Excel, or PowerPoint). The files “desktop.ini”, “thumbs.db”, “.ds_store”, “icon\r”, “.dropbox”, and “.dropbox.attr”. There are certain types of files that Dropbox can’t sync or that create sync issues. If you have different versions of files, the Dropbox app will not sync. Just keep the latest version of the files. Make sure the file you are trying to upload is not open on your computer. To be precise, make sure that the problem is not related to your connectivity or system. Before getting into the technical aspects, check out all the primary reasons why Dropbox might not be syncing on MacBook.