gistfile1.txt

Follow these steps
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1) Create a folder on local disk Eg: C:\Users\keerthip\Documents\Dropbox
2) Create a Drive Letter Mapping eg:(H:) to the folder path in windows with following command 
subst H: C:\Users\keerthip\Documents\Dropbox
3) Install Dropbox desktop software in advanced Mode.
Select the new local drive H: and sync either selective folders or all folder to local drive ( which is original folder path)
4) Wait till content is fully synced from web account
5) Pause Syncing and Exit Dropbox
6) Delete local folder drive mapping with following command
subst H: /d
7) Remap your network drive with same Drive Letter Eg:H:\
8) Copy your content from original location to network drive 
Eg; Copy created DropBox folder from C:\Users\keerthip\Documents to H:\
9) Start Dropbox.Now Dropbox should work as usual