Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance. Storage Drive Bays 1 Compatible Drive Type* (See all supported drives) 3.5" SATA HDD 2.5" SATA SSD (with optional 2.5" Disk Holder) Hot Swappable Drive* - Notes "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. External Ports RJ-45 1GbE LAN Port 1 USB 3.2 Gen 1 Port* 2 Notes: This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes. The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. File System Internal Drives Btrfs EXT4 External Drives Btrfs EXT4 EXT3 FAT NTFS HFS+ exFAT Appearance Size (Height x Width x Depth) 166 mm x 71 mm x 224 mm Weight 0.7 kg Others System Fan 60 mm x 60 mm x 1 pcs Fan Speed Mode Full-Speed Mode Cool Mode Quiet Mode Low-power Mode Brightness Adjustable Front LED Indicators Power Recovery Noise Level* 19.0 dB(A) Scheduled Power On / Off Wake on LAN / WAN Power Supply Unit / Adapter 36 W AC Input Power Voltage 100V to 240V AC Power Frequency 50/60 Hz, Single Phase