My girlfriend has recently ran out of space on her MBP internal hard drive. She's a free lance photographer and we know that her photo collection stored in "Pictures" is what's taking up all of her space. She has an external hard drive and so she's made a complete Time Machine backup on that. Now she wants to completely delete all of the "Pictures" folder from her MBP since they're all now saved on her external hard drive. In the future, will Time Machine replace the backed up "Pictures" folder with her new empty one, or will it leave all her old backed up photos alone?