Did not work for me, any code you have to run when it boots up?There is no need for reinstalling the PBX.
If this is the same VPS, Shutdown VPS increase HD and power up VM, after that check the Dashboard; System Settings; Disk Usage.
If you are moving 3CX from one VPS to antoher then backup your 3cx config and restore it on that new VPS
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.