Hi all, Not sure if anyone can help here. Been trawling the net for answers and so far no joy. I have been creating some very large video files over the past couple of days that were always destined for a seperate external drive so didn't want or need Time Machine to back them up and waste backup drive space (plus I back up wirelessly to another external drive via an Airport Extreme so not the fastest). I switched off Time Machine, created the files on my desktop, moved them to the external drive, trashed them (and emptied the trash) and then switched Time Machine back on. However, Time Machine is still finding an additional 85GB of data to backup! I tried excluding the desktop from the backup selection but that made no difference. I assume this is something to do with Time Machine still seeing changed/created data residing on the drive although they have since been deleted from the directory. I've found other posts suggesting to create a "Do Not Backup" folder to exclude from backups and use that as a temporary storage location which I have now done for future but I need to find out if there is anyway to stop it backing up these deleted files now. Can anyone help please?