I know about netinstall disk space reclaim, doing that occasionally, but not sure how much it will help, I’m sure less than 100KB will be free. I did netinstall after reverting to 7.16 version, backup file was reduced about 40KB with same config for same ROS version. How large is you config file when is exported when performing /export show-sensitive file=export.rsc? My is 141.6KB (having lots of rules and scripts) and also having 3 certificates with keys added, no manually added files on flash, so even if I will have 40-50KB space left after netinstall 7.17 I’m worried about small amount of disk space growth per config chnage or even worse if is needed by VM swap file, if ROS uses it, which can lead to out of space eventually, see some discussion about it → http://forum.mikrotik.com/t/echo-system-error-critical-could-not-save-configuration-changes-not-enough-storage-space-available/181580/1