To use external storage devices with Microsoft exFAT (Extended File Allocation Table) format, your Synology NAS requires an exFAT license. This article explains how to install the required license on your Synology NAS.
Resolving External USB HDD Mount Issues on Synology NAS (exFAT) If you’ve recently connected an external USB HDD to your Synology NAS and encountered an error message like “System failed to mount external device [USB Disk 1] partition [1]&rdqu