Synology NASes have various apps for syncing mobile devices, such as DS Photo for uploading photos to Photo Station, Synology Drive for more of a Dropbox approach, and MailPlus for contacts, emails, etcs.

https://www.synology.com/en-nz/dsm/feature/photo_station https://www.synology.com/en-nz/dsm/feature/drive https://www.synology.com/en-nz/dsm/feature/mailplus