Hi - I'm using Retrospect Express 7.6.111 on a Windows 7 machine to backup three drives to a 2Tb external USB drive, i.e., 1863Gb, of which currently about 1176Gb is free. The backups consist of two backup sets, both set to use 'at most' 99% of the drive. However, both backup sets seem to be limiting themselves to using only 340Gb each on the backup drive. One is now complaining that it cannot free up enough space by grooming (to Retrospect's defined policy). No quota is set in Windows. Previous members in the backup set that is not complaining have been marked as lost or damaged as various (smaller) backup drives have failed in the past. I think with the complaining one I just started a new backup set instead. When I look at the properties of either of the current backup sets, it is showing the size as 1860Gb, 1160 free. Windows shows their size as 340Gb each. I tried reducing the size of the complaining one to 98% (so it currently shows 1844Gb as the size), thinking that changing the setting might make it notice that there is plenty of space available, but the same problem occurs. A screenshot is attached.