A quick way to check your SSD is open Windows Explorer and use the search function in the upper right and search by size (both large and gigantic which takes two passes). Sort results by directory and take note of them (probably just a handful of directories).

Audio and video consume a lot as well as the download folders and temporary folders. Most audio/video folders can be moved to another drive and change the folder locations in the appropriate programs. Downloads/temp files can either be moved or deleted in most cases (if your download speed is slow, best to move them just in case a reinstall is necessary).

Yes, I use WinDirStat which is a great tool for checking our HD space.
 
Thank you

scook
Here are the files from two month ago http://forum.cakewalk.com/FindPost/3264981. No new files are needed and the file sizes have not changed that much. The 500MB installer for the help files only installs around 100MB of pdf and help. No one has yet accounted for the addition 400MB in the installer. Most of the drum replacer installs into Cakewalk Content which if you have not already moved off the system drive might be a good candidate.

I remember a post where Susan g queried it and a cakewalk staffer said it was due to the various languages included in the installer but it only installed the appropriate language.