Files on Synology NAS not refreshing

Linux / Samba can do change notifications, but how well they do it (and how long you have to wait for the notifications) can vary greatly.

Updating the firmware (and other related NAS-side and, sometimes, PC-side software/drivers) has fixed problems with some Synology devices and similar.

Please see the Changes to folders are not always detected guide for other troubleshooting and debugging steps.