StR posted : One more thought in addition to what tvsjr suggested:
Are you syncing a bunch of small files? Are you using the application from Dropbox for that? I've never used that myself But even for Windows itself, while copying between external, and especially network-mounted (via Samba) storage drives, it is not uncommon to slow down by 1-2 orders of magnitude while copying lots of tiny files.
This can be exacerbated if the network transfer is implemented with a "per-file" overhead, e.g. if a new data connection is opened for each file being transferred. You could see that with ftp transfers. I don't know how it is implemented in Dropbox.
For this, a more representative test could be if you tried to sync a folder with large files (at least 10's of MB each).
Are you syncing a bunch of small files? Are you using the application from Dropbox for that? I've never used that myself But even for Windows itself, while copying between external, and especially network-mounted (via Samba) storage drives, it is not uncommon to slow down by 1-2 orders of magnitude while copying lots of tiny files.
This can be exacerbated if the network transfer is implemented with a "per-file" overhead, e.g. if a new data connection is opened for each file being transferred. You could see that with ftp transfers. I don't know how it is implemented in Dropbox.
For this, a more representative test could be if you tried to sync a folder with large files (at least 10's of MB each).