Is the memory upgradable?

No it can't. DS220J memory is fixed at 512 MB. Current software upgrade requires a minimum of 1 GB according to Synology's own notes. Avoid this model/brand.

what physical size harddrives can be used?

The hard drive "size" is not the physical size of the drive itself but the diameter of the platter inside the drive. A standard desktop HDD is 5.75" x 4" but has a 3.5" platter inside. Hence the name 3.5" drive even though it is physically much bigger. A notebook HDD measures 4" x 2.75" and referred to as a 2.5" drive.

If single drive is installed initially, then 2nd drive is added later. does raid 1 get configured? or does both drive need to be installed together?

I installed one drive initially, and then added a second drive later. The second drive was automatically added as a Raid 1 drive.

Can it be used as a datastore for esxi or backup VMs?

Technically you can but not recommended. You will likely get terrible performance because the CPU and memory is not designed for this use case. 512MB RAM is very low for a datastore. This model is really geared towards traditional file sharing and media streaming. You want something with higher CPU and read/wrtie caching like the DS218/DS218+.

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Synology DiskStation DS223J Network Attached Storage Drive (White)

Product ID: 548252410

Details

Brand
Synology
Colour
Black
Material
Plastic Glass
Product Dimensions
16.5D x 10W x
Size
2-bay

🌐Multi-platform access: PC, Mac, Linux, mobile & browser

💾2-bay storage, up to 32TB raw capacity

🔄Seamless sync with public clouds & Synology systems

€ 647.41

Duties & taxes included

In stock

Sold byAmazon MaltaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your data game with Synology DS223J — where storage meets smart collaboration!

EFFORTLESS CLOUD INTEGRATION - Sync your private NAS with Google Drive, Dropbox, OneDrive, and more for ultimate flexibility.
REAL TIME TEAM COLLABORATION - Boost productivity with Synology Office for seamless multi-platform teamwork.
MASSIVE 32 TB STORAGE CAPACITY - Store and safeguard your critical data with expansive dual-bay support.
UNIVERSAL DEVICE COMPATIBILITY - Access and manage files effortlessly across Windows, macOS, Linux, Android, and iOS.
ALL IN ONE SURVEILLANCE BACKUP - Secure your workspace with built-in NVR and mobile photo backup solutions.

The Synology DiskStation DS223J is a sleek, 2-bay NAS designed for professionals seeking reliable, high-capacity storage up to 32TB. It offers seamless multi-platform file access, real-time collaboration via Synology Office, and robust cloud synchronization with major public cloud services. Ideal for small offices and home users, it also integrates surveillance and photo backup features, all backed by a user-friendly interface and 2-year warranty.

Specifications

ASIN	B0C8814GKB
Assembly Required	Yes
Box Contents	Main Unit X 1 Accessory Pack X 1 Quick Installation Guide X 1
Brand Name	Synology
Colour	Black
Compatible Devices	Android Phone, Windows PC, iPhone, macOS
Country of Origin	Taiwan
Customer Reviews	4.5 4.5 out of 5 stars (865)
Enclosure Material	Plastic Tempered Glass
Global Trade Identification Number	00846504004768
Importer Contact Information	9F., No.1, Yuandong Rd., Banqiao Dist., New Taipei City 220632, Taiwan
Item Dimensions D x W x H	16.5D x 10W x 22.6H Centimeters
Item Type Name	NAS
Item Weight	0.87 Kilograms
Manufacturer	Synology, Synology Inc., 9F., No.1, Yuandong Rd., Banqiao Dist., New Taipei City 220632, Taiwan
Manufacturer Contact Information	Synology Inc., 9F., No.1, Yuandong Rd., Banqiao Dist., New Taipei City 220632, Taiwan
Manufacturer Part Number	DS223j
Model Number	DS223j
Mounting Type	Floor Mount
Number of Items	1
Packer Contact Information	9F., No.1, Yuandong Rd., Banqiao Dist., New Taipei City 220632, Taiwan
Size	2-bay
UPC	846504004768
Unit Count	1 Piece
Warranty Description	2 Years

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