I don't bother with bundles - I just have a batch file to copy my Cakewalk Projects, Picture cache and Global Audio directories over to my cloud drive (and another one that copies them back).
This is not just for backups, but also to keep my laptop, "bedroom" studio PC and my main studio PC projects in sync.
The reason for using batch files, is so that the cloud service isn't scanning my real cakewalk directory whist cakewalk is using it (which would crash cakewalk). It also means I can be more selective about which files I want to backup.
Personally, I'm using MEGA as it was the best bang-for-buck at the time, and ended up upgrading to a paid version for the extra space. But shop around for the best deals.
Here's an example of what my batch file looks like:
CopyToMega.bat:
ROBOCOPY "C:\Cakewalk Projects" D:\CakewalkCloudProjects\SEQUENCE *.* /E /COPYALL /DCOPY:DAT
ROBOCOPY "C:\PICTURE" D:\CakewalkCloudProjects\PICTURE *.* /E /COPYALL /DCOPY:DAT
ROBOCOPY "C:\Cakewalk Content\Cakewalk Core\Project Templates" D:\CakewalkCloudProjects\TEMPLATES *.* /E /COPYALL /DCOPY:DAT
ROBOCOPY "C:\WAVEDATA" D:\CakewalkCloudProjects\WAVEDATA *.* /E /COPYALL /DCOPY:DAT
CoptFromMega.bat:
ROBOCOPY D:\CakewalkCloudProjects\SEQUENCE "C:\Cakewalk Projects" *.* /E /COPYALL /DCOPY:DAT
ROBOCOPY D:\CakewalkCloudProjects\PICTURE "C:\PICTURE" *.* /E /COPYALL /DCOPY:DAT
ROBOCOPY D:\CakewalkCloudProjects\TEMPLATES "C:\Cakewalk Content\Cakewalk Core\Project Templates" *.* /E /COPYALL /DCOPY:DAT
ROBOCOPY D:\CakewalkCloudProjects\WAVEDATA "C:\WAVEDATA" *.* /E /COPYALL /DCOPY:DAT
Note that C:\WAVEDATA is my Global Audio Directory, and C:\PICTURE is my picture cache.
D:\CakewalkCloudProjects is the directory that syncs up to my MEGA account.
Also, in order to use the /DCOPY:DAT option, I needed to give the batch files admin permission.