60,456 reviews

ZyXEL Network Attached Storage (NAS) NAS520 2-Bay Compatible Accessories

100% ZyXEL Compatible Upgrades from the UK's Leading Supplier of Memory & SSDs

Not your exact model? See all ZyXEL Network Attached Storage (NAS) models, or identify your model with our ScanMyPC App

Model Specifications

Make & Model:

ZyXEL Network Attached Storage (NAS) NAS520 2-Bay

Increase the storage capacity and read/write speed of your Network Attached Storage (NAS).

Choose an Accessory for your ZyXEL Network Attached Storage (NAS) NAS520 2-Bay:

Integral UltimaPro X2 SD Card - V90 UHS-II

Kingston Canvas Go! Plus SD Card - V30 UHS-I

Integral UltimaPro X2 SD Card - V90 UHS-II

Product Specifications

UltimaPro X2 SDHC/XC are professional grade Video Speed 90 memory cards from Integral featuring the UHS-II interface and designed to complement the latest pro DSLR cameras and video cameras compatible with UHS-II. Our advanced chip-set delivers blistering read and write speeds up to 300MB/s and 280MB/s. Ideal for recording 8K, 4K, 2K, Full HD, 3D video and RAW and JPEG images.

Size Stock Price (Inc VAT) Quantity

128GB / SDXC

INSDX128G-300/280U2

1 DAY

BEST SELLER

QUOTE

Benefits of Upgrading Installation Guides Returns & Refunds Delivery Options

Orders placed Monday to Friday after 4.30pm (UK time) or on weekends/bank holidays will be processed the next business day.
(subject to stock, order verification and chosen delivery option)

FREE
Warranty

SECURE
Payment

FREE & FAST
UK Delivery

UNLIMITED
Support

32 YEARS
and Counting

Trusted & Reliable Customer Reviews

Good service

Great after care when we had an issue

Chris - Friday 22nd May 2026

Show reply

Mr Memory was very helpful all the time

M. Bran - Tuesday 19th May 2026

Verified order

Show reply

Items arrive quickly and well packaged

Items arrive quickly and well packaged. Bought from Mr Memory 4 or 5 times over past few years. Always great customer support.

Sharon E - Monday 4th May 2026

Verified order

Show reply

First Class all round!

I don't use Mr Memory frequently but have bought from them for many years when upgrading my (and extended friends and family's) various computers or replacing hard drives. I have never had cause to contact them outside of the normal process because a) everything has always been spot on and b) I haven't been a numpty before and ordered the wrong thing! So the most recent transaction with them has been a wholly enjoyable experience and totally different from any other contact I have had with any other company.
I ordered PC memory, when I should have ordered laptop memory -totally my fault! - and upon completing the returns details (which is all free post by the way!) I received an email from a wonderful person named Zoe, who happens to be Head of Operations, within 30 minutes giving me a return reference and asking what I wanted to exchange it for (the return request was for replacement not refund).
I replied with my brain fart issue and stated the laptop memory needed.
I received a very fast reply stating the laptop memory will not be in stock until the following Monday.
I then - being the awkward customer I am - asked if it could be posted to a different address as I was on a bit of a time crunch. Zoe replied saying it wouldn't be a problem. I then asked how I could pay the (very small amount) difference..... and she replied saying that they wouldn't charge any more than I had already paid!
If anyone out there doesn't agree about the absolute first class customer focus and service after hearing all my issues and stupidity that Zoe dealt with....
I have no words!
Thank you Zoe and Mr Memory, I am very glad I purchase hardware from you and will continue to do so!

HSP - Friday 24th April 2026

Show reply

4.9 out of 5 MORE REVIEWS

Size	Photos	Music	Video
1TB	356,914	237,942	158,953	118,971	243,793	20,966 mins	1,657 mins
512GB	178,457	118,971	79,476	59,485	121,896	10,483 mins	828 mins
256GB	89,228	59,485	39,738	29,742	60,948	5,241 mins	414 mins
128GB	44,614	29,742	19,869	14,871	30,474	2,620 mins	207 mins
64GB	22,307	14,871	9,934	7,435	15,237	1,310 mins	103 mins
32GB	11,153	7,435	4,967	3,717	7,618	655 mins	51 mins

Trust the Mr Memory Brand

Feel Safe, Feel Secure & Feel Appreciated

We help people to feel safe, happy and secure. You can trust the Mr Memory brand - we will protect your data, save you money and improve the performance of your valued devices, whilst being eco-responsible.

Our specialists provide free support to anyone who needs it - at any stage of the order process. Our communication is fast and our guidance is as technical or as basic as you need it to be.

Buy from a UK based company with 32 years experience
100% Safe & Secure website
Fully informed at every stage of the order
Fast dispatch - 98% of orders dispatched same day
Highest quality brand new products from the best brands in the world
Free environmentally friendly recycling of your old product
Accurate database with new models added daily
30-day credit available to the Public / Private Sector
250,000+ businesses use Mr Memory for their Memory/RAM & SSD upgrades
Over 150,000 registered online customers
We are compliant with the latest privacy regulations including the UK and EU GDPR

Working Towards a Sustainable Future

Mr Memory is tackling climate change as a team with an aim to being carbon neutral by 2027.

Our employees are encouraged to walk, cycle or car share
We encourage our employees to stay healthy, eat more sustainable food and buy locally
We always try to purchase from UK based companies where possible
We hold regular staff meetings where our employees opinions on climate change are heard
We supply appropriate uniform to reduce heating and air-con use
We have waste reduction procedures in place - all of our packaging can be recycled
Our refuse bags are bio-degradable
Our cleaning equipment and products are all eco-friendly
Our printing is limited to essential customer paperwork only
When not in use all electrical devices are turned off and we always purchase energy efficient devices
Our energy supplier is moving to 100% renewable electricity and is a COP29 Principal Partner
All of our suppliers use recyclable packaging, which we reuse where possible
We are constantly reviewing our Sustainability Statement

Play our educational HD videos

WATCH 30+ VIDEOS

Brand:	Integral
Transfer Speed:	Up to 300MB/s Read / 280MB/s Write
Features:	Large RAW and JPEG images can be saved to UltimaPro X2 memory cards at ultra-fast speed, with no lag - great for burst-mode photography Certified to V90 (Video 90) standard. V90 SDHC/XC memory cards offer 90MB/s sustained video recording with no dropped frames. Designed to support cinema-grade video recording, ensuring smooth video capture at up to 8K resolution. Ideal for today's 4K UHD and Full HD devices and future-proof for 8K video Made from Pseudo SLC (pSLC). Compared to normal MLC (used in other high-performance cards), Integral UltimaPro X2 memory delivers 6 times more endurance. Providing a substantial 20,000 Read/Write cycles. Optimised for high-performance devices that support UHS-II (Ultra-High-Speed Interface 2) Complete with free protective case
Operating Environment:	-25°C to 80°C
Dimensions:	32mm x 24mm x 2.1mm
Weight:	2g
Compatibility:	For use in SDHC compliant devices including: digital cameras, camcorders, MP3 players, satellite navigation systems, digital photo frames, DAB radios, TVs, car audio, tablet PCs, laptops and netbooks.
Warranty:	5 Year Manufacturers Warranty

ZyXEL Network Attached Storage (NAS) NAS520 2-Bay Compatible Accessories

100% ZyXEL Compatible Upgrades from the UK's Leading Supplier of Memory & SSDs

Product Specifications

Installation & Support

Fast & Professional Support

Installation

Support

Delivery, Returns & Refunds

Fast Delivery

Fast Returns & Refunds

Trusted & Reliable Customer Reviews

Good service

Mr Memory was very helpful all the time

Items arrive quickly and well packaged

First Class all round!

Benefits of Upgrading your Memory Card?

Storage Capacity Chart

Trust the Mr Memory Brand

Feel Safe, Feel Secure & Feel Appreciated

Working Towards a Sustainable Future

We are eco‑responsible

Play our educational HD videos

What is a Matched Pair?