Windows cmd/batch monkeys (Robocopy and Del)

[LeperousDust]

Right well i fully except the usual people to appear in this thread

Two problems: First i've got robocopy set up luuurvely and its mirroring happily see below:

robocopy.exe "D:\Documents" "E:\Backup\Documents" /S /ZB /COPYALL /LOG:E:\Backup\Documents.txt /DCOPY:T /R:10 /TEE
robocopy.exe "D:\Pictures" "E:\Backup\Pictures" /S /ZB /COPYALL /LOG:E:\Backup\Pictures.txt /DCOPY:T /R:10 /TEE
robocopy.exe "D:\Videos" "E:\Backup\Videos" /S /ZB /COPYALL /LOG:E:\Backup\Videos.txt /DCOPY:T /R:10 /TEE
robocopy.exe "D:\Music" "E:\Backup\Music" /S /ZB /COPYALL /LOG:E:\Backup\Music.txt /PURGE /DCOPY:T /R:10 /TEE
PAUSE
EXIT

I'm happy to have a carbon copy type process for my music as its a huge collection, but as you can see from the others, its more of an accumulation of files over time. What i'm kinda after is a way to make the documents robocopy process Incremental or Differential, is this feasible?

Second problem:
I want to make my downloads folder temporary, so files with certain attributes date/size/type etc... are deleted, and/or moved, but i have no idea where to start properly with if statement regarding attributes in batch files....

A lot of this is over my head! Googling is drawing blanks annoyingly so a little nudge in the right direction would be appreciated