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+.

Ds223j | Desertcart Uruguay

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$U21558

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Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your data game with DS223j — your private cloud powerhouse!

OWN YOUR DATA ANYWHERE - Create a secure private cloud with seamless multi-platform access—your files, your rules, from any device, any location.
SMART HOME SECURITY HUB - Monitor your property 24/7 with support for multiple IP cameras and remote viewing—peace of mind in your pocket.
COMPACT POWERHOUSE DESIGN - Sleek, quiet, and energy-efficient with a 2-bay setup that fits perfectly on your desk while scaling your storage needs.
SYNOLOGY BACKED RELIABILITY - Enjoy 2 years of warranty plus expert support and continuous software updates—future-proof your data ecosystem.
EFFORTLESS BACKUP AUTOMATION - Set-and-forget backups for Macs, PCs, and mobiles to multiple destinations including cloud and external drives—never lose a byte again.

The Synology DS223j is a compact, energy-efficient 2-bay NAS designed for professionals seeking secure private cloud storage, automated multi-device backups, and integrated home security surveillance. With seamless multi-platform access, intelligent video monitoring, and robust Synology support, it offers a reliable, scalable solution to protect and share your data effortlessly.

Specifications

ASIN	B0C8814GKB
Best Sellers Rank	#5 in Network Attached Storage (NAS) Enclosures
Brand	Synology
Built-In Media	Item
Color	White
Compatible Devices	Android, Desktop, Laptop, iPhone
Customer Reviews	4.5 out of 5 stars 831 Reviews
Enclosure Material	Plastic, Tempered Glass
Global Trade Identification Number	00846504004768
Is Assembly Required	Yes
Item Dimensions D x W x H	6.5"D x 3.94"W x 8.9"H
Item Weight	0.87 Kilograms
Manufacturer	Synology
Material	Plastic, Tempered Glass
Mfr Part Number	DS223j
Model Number	DS223j
Mounting Type	Tabletop
Product Dimensions	6.5"D x 3.94"W x 8.9"H
Size	2-bay
UPC	846504004768
Unit Count	1.0 Count
Warranty Description	2 years

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