The 256GB UHS-II SDXC Iridium Memory Card from ProGrade Digital features a storage capacity of 256GB and takes advantage of the UHS-II bus to support advanced DSLR and mirrorless functions such as continuous shutter bursts and rapid shooting as well as raw and JPEG captures. This card is also well-suited for video capture, including 4K and Full HD video, and can achieve maximum read speeds of up to 300 MB/s and maximum write speeds of up to 275 MB/s. Thanks to its V90 speed class rating, minimum write speeds are guaranteed not to drop below 90 MB/s.
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Key Features
- 256GB Storage Capacity
- UHS-II / V90 / U3 / Class 10
- Max Read Speed: 300 MB/s
- Max Write Speed: 275 MB/s
The 256GB UHS-II SDXC Iridium Memory Card from ProGrade Digital features a storage capacity of 256GB and takes advantage of the UHS-II bus to support advanced DSLR and mirrorless functions such as continuous shutter bursts and rapid shooting as well as raw and JPEG captures. This card is also well-suited for video capture, including 4K and Full HD video, and can achieve maximum read speeds of up to 300 MB/s and maximum write speeds of up to 275 MB/s. Thanks to its V90 speed class rating, minimum write speeds are guaranteed not to drop below 90 MB/s.
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$269.99
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ProGrade Digital 256GB UHS-II SDXC Overview
Laser-Etched Serial Numbers
This card features a laser-etched custom code to help keep counterfeiters at bay.
Advanced Recovery Pro Software
Worry less about losing photos and videos, or from card corruption with ProGrade Digital's software. Available as a downloadable purchase from their site, you can find it right away if your files can be restored
SDA Compliance
This card is SDA compliant and backward compatible with UHS-I.
Refresh Pro
This card is Refresh Pro enabled to quickly refresh card performance and monitor its health.
UPC: 810188400130
ProGrade Digital 256GB UHS-II SDXC Specs
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ProGrade Digital 256GB UHS-II SDXC Reviews
Very fast
By John
Rated 5 out of 5
Date: 2026-05-13
I loaded these into my Canon R62 and was able to fire off a 35 exposure burst at ultra high speed and review the images almost immediately. Read speeds to my MacBook are very fast also.
Best you can buy!
By Kyle
Rated 5 out of 5
Date: 2026-05-04
These cards are awesome and for the value you get two. I shoot almost everyday and have never had an issue.
See any errors on this page?
Can I use this card with my Sony FX2 to record in
Can I use this card with my Sony FX2 to record in 4K XAVC-I at 60fps?
Yes, for FX2 recording mode XAVC S-I 4K 600Mbps, the ProGrade Digital 128 GB UHS-II SDXC Iridium Memory Card (2-Pack) V90 cards can be used, and you could also work with CFexpress type A cards.
Sony says: CFexpress Type A memory card (VPG200 or higher) or
SDXC V90 or higher for XAVC S-I 4K at 600Mbps recording formats.
Date published: 2026-05-06
Specifically regarding the 128GB SD card, is the ...
Specifically regarding the 128GB SD card, is the max write speed 200 MB/s or 275 MB/s? Specs and image have different info.
Based on Progrades own website the Iridium 128gb model only goes up to 200. While the other sizes go up to 275.
Date published: 2025-08-24
