As you know Dropbox is the excellent solution for storing our files on cloud but sometimes we may want to upload bulk files from one location to another,for example if you like to upload your existing backup from your host to Dropbox.This type of uploading files from one server to another is called Remote upload.
There ain’t much services to accomplish this task,if you Google it you wont find any filehost which will support remote uploading,Fortunately you can remote upload your files to Dropbox using the DropBox Apps.
The following two Dropbox apps will help to remote upload your files
http://urldroplet.com/ – You can upload upto 300MB
https://www.sidecloudload.com/ – You can upload upto 25MB
Personally I have used both the apps and both works very well,especially I tried UrlDroplet with 250MB file and it worked like a charm.