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Full user review
"Watch out for file naming issues"
Excellent easy synchronization, storage space pricing is reasonable
Dropbox storage is done on a Windows server. Windows does not recognize Mac file naming conventions. See my comments below.
Here is the problem: Dropbox stores your files on a Windows serer. Windows does not recognize the use in file and folder names of double-spaces, leading spaces, (which you might sometimes use to move a file to the beginning of an alphabetic list), trailing spaces, /, \, +, -, -, =, *, &, and who knows what else. Mac OS X permits most of these (the basic rule is to avoid only colons) and so the unknowing among us innocently use all kinds of characters in our file names, over the years.
When you place files named using one or more of these characters in your Dropbox, the synchronization process will begin to store multiple copies of your file on your hard drive, each one suffixed with the dreaded words "white space conflict".
I was naïve about this and ended up with roughly 70,000 such multiplied files and folders occupying several gigabytes scattered all over my hard drive, before I finally realized what was happening. Almost everywhere I looked, I would find long lists of the same folder or file with "white space conflict" appended to the end of the name.
To get rid of the problem, you'll need to use a reliable utility such as A Better Finder Rename (which I have no relation to except being a satisfied customer) to change the names of the thousands of files and folders on your Mac that break Windows naming conventions. It takes some time to learn to use this renaming utility and $30 to pay for it. It's extremely flexible and appears to do a thorough and careful job, but it's always a risk using even the best software to rename files and folders on this scale without screwing up your hard drive in some way, so you'd better back everything up first. I spent hours using it to rename the thousands of Windows-phobic files and folders dating back over 20 years that I have accumulated in my business.
I'm spending time posting this because I have seen numerous complaints on the Dropbox web site about this problem, but not a single reviewer that I have read has mentioned it. Be aware before you start.