When using the scheduled backup and if I include "Custom templates and IP Phone Firmwares" I get an error in on the Filezilla server: 450 Internal error renaming the file. Then I am left with 3CXScheduledBackup.zip.tmp as a backup file. If I perform a manual backup, no issue. If I don't include Custom templates and IP Phone Firmwares, no issue. Not using encryption. Running lastest version of Filezilla (Win Srv 2012 R2) and 3cx v15.5 SP4 running on Win Srv 2012 R2 8GB RAM. I do have 1 custom template that is about 350K and my backups are around 16MB in size. Any ideas?