1. Welcome
2. Instead of pasting a picture, use the # icon to add [ CODE ][ /CODE ] tags and paste in between
3. The QAT customizations (at least in 2010) are stored as XMS file in C:\Users\------\AppData\Local\Microsoft\Office\Excel.officeUI
Manually editing the file can make the FileSave icon not visible, so it can be hidden, but possibly not with CUstomUI
4. There is some CustomUI
that I thought would work, but doesn't hide FileSave (again, this is with 2010). Possibly only can be used to add commands. I really did not experiment much