I got a Sinology nas as well: Raspberry 2 OSMC + DSM.5 Synology - Problem with NFS:
Try to have a look at your own /etc/exports, but if I think the issue is fixed with all_squash, so you have to change your squash setting.
I got a Sinology nas as well: Raspberry 2 OSMC + DSM.5 Synology - Problem with NFS:
Try to have a look at your own /etc/exports, but if I think the issue is fixed with all_squash, so you have to change your squash setting.