While intended for home use, the DS418j has many of the same features as Synology's higher end offerings. Its Linux-based DiskStation Manager (DSM) operating system offers cross platform file sharing over various network protocols including SMB, AFP and NFS. The DS418j also offers support for multiple RAID types, iSCSI and domain authentication.

General DSM Specification
Networking Protocol SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP)
File System • Internal: ext4
• External: ext4, ext3, FAT, NTFS, HFS+, exFAT2
Supported RAID Type Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
Storage Management • Maximum internal volume: 256
• Maximum iSCSI target: 10
• Maximum iSCSI LUN: 10
File Sharing Capability • Maximum local user account: 1,024
• Maximum local group: 256
• Maximum shared folder: 256
• Maximum concurrent SMB/NFS/AFP/FTP connection: 100
Privilege Windows Access Control List (ACL), application privileges
Directory Service Windows AD integration: Domain users login via SMB/NFS/AFP/FTP/File Station, LDAP integration
Security Firewall, encryption shared folder, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt support, HTTPS (customizable cipher suite)
Supported Client Windows 7 and 10, Mac OS X 10.11 onwards
Supported Browser Chrome, Firefox, Internet Explorer 10 onwards, Safari 10 onwards; Safari (iOS 10 onwards), Chrome (Android 6.0 onwards)
Interface Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, 日本語, 한국어, 繁體中文, 简体中文

The DS418j's capabilities can be expanded even further by downloading and installing add-on packages. Within the Package Center, you'll find packages that will let you perform data backups, stream multimedia content, sync your data to the cloud and even manage IP cameras deployed within your home.

Packages and Applications
File Station Virtual drives, remote folders, Windows ACL editor, compressing/extracting archived files, bandwidth control for specific users/groups, creating sharing links, transfer logs
FTP Server Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL/TLS and SFTP protocol, boot over the network with TFTP and PXE support, transfer logs
Universal Search Offer global search into applications and files
Backup Tool DSM configuration backup, macOS Time Machine support, Cloud Station Backup
Shared folder sync - maximum task number: 2
Cloud Station Suite Sync data between multiple platforms by installing the client utilities on Windows, Mac, Linux, Android and iOS devices, while retaining up to 32 historical versions of files
Maximum concurrent file transfer: 100
Cloud Sync One or two-way synchronization with public cloud storage providers including Amazon Drive, Amazon S3-compatible storage, Baidu cloud,  Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk, Microsoft OneDrive, OpenStack Swift-compatible storage, WebDAV servers, Yandex Disk
Surveillance Station Maximum IP camera: 16 (total of 480 FPS at 720p, H.264) (including two free camera licenses; additional cameras require the purchasing of additional licenses)
VPN Server Maximum connection: 5, supported VPN protocol: PPTP, OpenVPN, L2TP/IPSec
Mail Server Supported Mail Server protocol: POP3, SMTP, IMAP, support LDAP/AD account
Mail Station Webmail interface for Mail Server to receive emails from multiple POP3 mailboxes, customizable SMTP server
Collaboration Suite • Office maximum user: 10, maximum simultaneous editing user: 10
• Calendar: support CalDAV and access via mobile devices
Note Station Rich-text note organization and versioning, encryption, sharing, media embedding and attachments
Storage Analyzer Volume and quota usage, total size of files, volume usage and trends based on past usage, size of shared folders, largest/most/least frequently modified files
Security Advisor Malware detection/removal, user account/password, network, system-related security scan
Antivirus Essential Full system scan, scheduled scan, white list customization, virus definition auto update
Download Station Supported download protocol: BT, HTTP, FTP, NZB, eMule, Thunder, FlashGet, QQDL
Maximum concurrent download task: 30
Web Station Virtual host (up to 30 websites), PHP/MariaDB, third-party application support
Other Packages Video Station, Photo Station, Audio Station, DNS Server, RADIUS Server, iTunes Server, Log Center, third-party packages available on Package Center
iOS/Android applications DS audio, DS cam, DS cloud, DS file, DS finder, DS get, DS note, DS photo, DS video
Windows Phone applications DS audio, DS file, DS finder, DS get, DS photo, DS video