Steve Hayes wrote:

I used to sync data files between my desktop computer running Windows
XP and my laptop runiin Windows 7 using Dropbox.

Since Dropbox stopped supporting Windows XP yesterday, I've had to
develop a workaround. Here it is, in case it helps anyone facing a
similar problem -- one line in a batch file:

XXCOPY J:\Dropbox\*.* G:\Stevedoc\Dropbox\ /BN /s /y

sig spam omitted in reply

So one of those destinations must be a mapped network drive. Then why
do you need Dropbox at all? There are lots of sync tools, like SyncBack
Free. You used one but between Dropbox folders yet with drive mapping
the sync could be between any set of folders.