Is this NAS compatible with both Windows and macOS operating systems for file sharing and backups?

Yes, this NAS supports SMB/AFP/NFS protocols which are compatible with both Windows and macOS for file sharing and backups.

Questions & Answers: Synology DS725+ Dual-Core 2-Bay NAS with 32GB RAM and 16TB (2 x 8TB) of Synology Plus Drives Fully Assembled and Tested By CustomTechSales

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Synology DS725+ Dual-Core 2-Bay NAS with 32GB RAM and 16TB (2 x 8TB) of Synology Plus Drives Fully Assembled and Tested By CustomTechSales