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  1. Memory cards
  2. SanDisk Extreme PRO SD UHS-II Memory Card (V90)
SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant — photo 1 of 6
SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant — photo 2 of 6
SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant — photo 3 of 6
SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant — photo 4 of 6
SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant — photo 5 of 6
SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant — photo 6 of 6

SanDisk Extreme PRO SD UHS-II Memory Card (V90), 256GB Capacity, Up to 300MBs Read & Write Speed, 90MBs Sustained Video Speed, IP68 Water Dust Resistant

4.88 reviewsSKU: 350342
£388.99

Sold & fulfilled by STEELSTORM

Deliver to London

Delivered by Sep 23

If you order within 19 hours, 44 minutes

Delivery is calculated at checkout
SanDisk
  • Tap into pro performance With up to 300MB/s2 write speeds, help ensure your camera's buffer clears fast during continuous shooting and captures every remarkable shot.
  • Capture more without interruption With up to 512GB1 of storage, store up to 352 minutes of 4K UHD video3 shot at 60 fps and up to 286 minutes of 8K video3 shot at 30 fps without needing to swap cards or offload data; perfect for long event days and shoots.5
  • Accelerated workflow from scene to screen Up to 300MB/s2 transfer speeds mean less time waiting and more time creating. Streamline your editing process and get to delivery faster.

Warranty: 1 Year — effortless warranty claims with UK-wide coverage. Learn more

Details

Shipping Weight
0.11 Kg
Shipping Dimensions
10.14 cm x 14.00 cm x 2.50 cm
Features
Read speeds up to 300MB/s and write speeds up to 300MB/s
Capacity
256 GB
Form Factor
SDXC™
Compatibility
Backwards-compatible with SDHC/SDXC supported host devices
Sequential Read Performance
Up to 300MB/s
Sequential Write Performance
Up to 300MB/s
Dimensions (L x W x H)
0.09" x 0.94" x 1.26"
Weight
16.7 g
Model Number
SDSDXDM-256G-GN4IN
Operating Temperature
-25°C to 85°C
Non-Operating Temperature
-40°C to 85°C
Certifications
CE, FCC, C-Tick/RCM, UKCA, EAC, ICES

4.88 reviews

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Rate this product — your experience helps other buyers.

  • ALAmelia L.5 August 2026

    Used for: More than a year

    Pros

    Been through the washing machine and still works

    Cons

    The write-protect tab has gone loose

    Comment

    Survived a full wash in a jeans pocket, dried out on the windowsill, every photo intact!

    +2
  • HPHarry P.13 July 2026

    Used for: Less than a month

    Pros

    Bought two and both behave identically

    Cons

    No reader included

    Comment

    Went straight into a pair of R6 bodies for a job at the weekend and neither slot complained. Formatted in camera, shot about 4000 frames between them, offloaded clean. Nothing to fault so far!

    +3
  • AFAva F.5 July 2026

    Used for: More than a year

    Pros

    One card has covered two cameras with no fuss at all

    Cons

    You cannot tell the fakes apart by looking, so buy carefully

    Comment

    A friend bought what looked like the identical card from an auction site and his failed inside a month with half the capacity it claimed. Mine came from a proper retailer, cost more, and has been in constant use for two years without a wobble. That difference is the whole argument for not chasing the cheapest listing you can find.

    +1
  • RBRosie B.26 June 2026

    Used for: Less than a month

    Cons

    Reads smaller than the label once the camera has formatted it

    Comment

    Lost a chunk of the advertised capacity to formatting, which is normal, but still catches people out

    +1
  • FKFreya K.19 June 2026

    Used for: More than a year

    Pros

    Years old and still the fastest card in my bag

    Comment

    It has been in a 90D since the day I bought the camera and there is nothing left to report except that nothing has happened. No corrupt files, no stalls halfway through a burst at a rugby match, no unexplained format prompts. It has been rained on at least a dozen times and spent one memorable afternoon in a puddle on a touchline. What I notice most is the offload. A full card into Lightroom while I make a cup of tea, rather than the twenty minutes the old class 10 cards used to take, and over four years that time adds up to something worth having. Buy from somewhere reputable and it will outlast the camera it goes in.

    +1
  • PBPoppy B.12 June 2026

    Used for: More than a year

    Pros

    Dropped on a stone floor and did not care

    Cons

    Prices swing wildly, so watch for a sale

    Comment

    Two winters in a birding hide, in and out of gloves, and the only mark on it is the paint wearing off the label

    +1
  • ODOliver D.9 June 2026

    Used for: 3–6 months

    Pros

    Never once made the camera wait during a wedding

    Cons

    The little case cracked almost straight away

    Comment

    Wedding work is unforgiving and this has not put a foot wrong across a dozen of them. Dual slots, this one as the primary, and the buffer clears while the couple are still walking back down the aisle. The plastic case it shipped in split at the hinge almost immediately, which sounds petty until you are fishing a loose card out of the bottom of a camera bag in a dark vestry. Four months in and the card is flawless, the case is in a bin somewhere in Yorkshire!

    +12
  • ICIvy C.6 June 2026

    Used for: 6–12 months

    Pros

    Read speed is every bit as quick as claimed

    Cons

    Sustained write is nowhere near the number on the front

    Comment

    The gap between the big number on the label and what you actually get is the reason for three stars. The read figure is real and I measured it within a few megabytes in a decent reader. The write side is a different story: the card is happy for the first chunk of a transfer and then settles at roughly a third of what the packaging implies, which for stills is irrelevant and for long video is not. In a camcorder doing school concerts it has never dropped a frame, so it does what the class rating on the box promises. Just do not read the headline number as anything other than a burst figure, because that is all it is.

    +1

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Steelstorm is a trading name of Wayne Enterprise Ltd, registered in England and Wales, Company No. 00000000, VAT No. GB 000 0000 00. Registered office: 221b Baker Street, London A00 0AA, United Kingdom. All prices shown include VAT.

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