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 Storage Drive (White)

Product ID: 595837483

Details

Brand
Synology
Colour
White
Material
Acrylonitrile
Product dimensions
16.5D x 10W x
Size
2-Bay

🌐Multi-Platform Remote Access

💾2-Bay Storage Flexibility

🛡️Comprehensive Data Protection

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167098 Ft

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Description

💼 Own Your Data, Rule Your Workflow

TRUSTED RELIABILITY - Enjoy peace of mind with a 3-year warranty and a compact, stylish design that fits perfectly on your desk.
DUAL BAY STORAGE POWER - Expand your digital empire with flexible 2-bay HDD support for seamless data management and redundancy.
ANYWHERE ACCESS ANYTIME - Effortlessly sync and share files across Android, iPhone, Windows, and macOS—your private cloud on your terms.
PLUG AND PLAY SIMPLICITY - User-friendly setup and intuitive apps make managing your NAS a breeze—even if you’re new to network storage.
ROCK SOLID DATA SECURITY - Back up your entire media library and documents with robust protection to keep your work and memories safe.

The Synology DiskStation DS223J is a compact, dual-bay network storage drive designed for professionals seeking secure, multi-platform access to their data. With easy setup, comprehensive backup options, and a sleek white ABS enclosure, it offers reliable private cloud storage and seamless file sharing across devices, backed by a 3-year warranty.

Specifications

ASIN	B0C8814GKB
Best Sellers Rank	39,625 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 24 in Network Attached Storage (NAS) Enclosures
Box Contents	1 x Main Unit, 1 x Accessory Pack, 1 x Quick Installation Guide
Brand Name	Synology
Colour	White
Compatible Devices	Android Phone, Windows PC, iPhone, macOS
Customer Reviews	4.5 4.5 out of 5 stars (767)
Enclosure Material	Acrylonitrile Butadiene Styrene (ABS)
Global Trade Identification Number	00846504004768
Is Assembly Required	Yes
Item Dimensions D x W x H	16.5D x 10W x 22.6H centimetres
Item Type Name	NAS
Item Weight	0.87 Kilograms
Manufacturer	Synology
Manufacturer Part Number	DS223j
Model Number	DS223j
Mounting Type	Tabletop
Product Warranty	3 Years
Size	2-Bay
UPC	846504004768

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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167098 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hungary.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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