For anyone else looking for this answer that @Mthrboard has provided in the discord:
The question was how do you give your quick sync plex box WRITE permissions, You have to do this for each IP & NFS share you wish to grant write access to.
Notably, Plex Camera Sync will not work without write permission.
Mthrboard [US]Today at 1:09 AM
Unraid exports NFS shares as read only by default.
Your fstab is most likely fine. In unraid, under the share you want to export, set the NFS security to Private and apply.
A new box will pop up called Rules. In this box, type the IP of the machine you want to have write access followed by (rw) like so
192.168.1.10(rw).If other systems need write access you can enter more than one IP set separated by spaces
192.168.1.10(rw) 192.168.1.20(rw)and so on. If you want other systems to access the share read only append*(ro)after the last IP