As the proliferation of new memory card types continues, there are several good deals to be had on SDXC SanDisk Extreme Pro UHS-I type cards, especially via UK retailer PicStop [affiliate link]. These cards are fine for most stills and lower-bit-rate video.
I no longer consider anything under 64GB and UHS-II is preferred (especially with video and when high burst rates are required – look for V90 rather than V60 minimum sustained write speeds). That said, for UHS-I cards with 170MB/s read, and 90MB/s write speed (V30 min sustained write speed of 30MB/s) you can’t beat such a low price £14.99 for 64GB cards or £27.99 for 128GB for SanDisk Extreme Pro. These are fine for stills and all but the highest bit rate 4K video (please do your due diligence here, and check your manual first, though).
Manufacturers’ online stores aren’t usually the cheapest either – for fear of alienating retailers – but in the case of the faster UHS-II type cards the SanDisk Extreme Pro UHS-II (300/260 MB/s, read/write speed and V90 or min 90 MB/S ) cards can be found at very competitive prices. The 128 GB cards which are usually spread around the £195 – £259 mark, are available currently at £188.99 with free shipping over £25 via the official SanDisk online store [affiliate link]. If you’re a student or over 55 years of age there’s a 15% discount as well, though you will have to verify your eligibility.
During a briefing and interview with a SanDisk executive for the British Journal of Photography magazine, I was informed that the SanDisk Extreme Pro cards are designed to resist accidental exposure to water (SD cards are likely to go through washing machines, apparently) and can withstand a 10m fall. SanDisk is also one of the most faked brands with Extreme Pro being the top-of-the-range and most targeted for that reason, so buy from respected dealers and known websites.
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PicStop [UK stock, apparently]