Re: "Summarizing what everyone has said so far, it..."

• I think the thread is hitting on the big debate between price and reliability, but we gotta talk about sustained write speeds. Most cards brag about peak speeds, but for 8K RAW on the R5, that doesnt mean much if it drops after ten seconds. I've tried many over the years and honestly, I've seen the R5 overheat cards that aren't thermally efficient. Ngl, its frustrating when you see that little red icon because your card cant handle the heat. I remember shooting a wildlife sequence and the buffer just stalled out because the card was throttling... totally ruined the shot. If you want the absolute best performance without the buffer stuttering:
• Delkin Devices BLACK CFexpress Type B 512GB - these are serialized and have a 48-hour replacement guarantee. Their sustained write is basically unbeatable.
• Sony TOUGH CFexpress Type B 512GB - super rugged and I've never had a read error with them. Very rigid construction.
• Wise Advanced CFexpress Type B 512GB PRO - specifically the Pro version, which is designed for continuous high-bitrate video. Dont just look at the GB on the sticker. If you're doing heavy video, the minimum sustained speed is what actually keeps your R5 from throwing an error in the middle of a shoot. Better to spend a bit more now than lose a clients footage later...

Just saw this thread and ngl it makes my blood boil. The way memory card prices have stayed so high while the reliability is basically a coin toss lately is just ridiculous. You pay hundreds for a tiny piece of plastic and it still lets you down when it matters most. It's honestly exhausting.

• The quality control is basically non-existent these days
• Brands just slap a pro label on stuff to double the price for no reason
• Getting any actual help when a card fails is basically impossible Its such a scam tbh. We spend thousands on the R5 and then have to deal with these cards failing or overheating constantly. It drives me crazy because the companies clearly dont care as long as we keep buying. Really sorry you had to deal with that corruption mess though, its literally every photographers worst nightmare... hate that for you.

Gonna try this over the weekend. Will report back if it works!

Building on the earlier suggestion about sustained write speeds, honestly, you really gotta be careful with how these cards handle the internal heat during 8K RAW sessions. If the controller throttles, the R5 just stops recording. I would suggest comparing these two:

• Lexar Professional CFexpress Type B Card Diamond Series 256GB: King of sustained performance, hits 1600MB/s minimum sustained write. It stays stable but be careful, it can run hot.
• Sony TOUGH CFexpress Type B Memory Card 256GB: Built like a tank and has better thermal dissipation in my tests, tho the sustained write is slightly lower at 1480MB/s. Still plenty for 8K. Make sure your firmware is up to date too, cuz some early R5 versions had weird buffer clearing issues with certain high-speed cards. Let me know if you need the specific VPG specs for other capacities! TL;DR: Lexar Diamond for pure speed and peace of mind, Sony Tough for better heat management and build quality.

Get any CFexpress Type-B cards and UHS-II V90 cards.

This is exactly what I needed to hear. Youre a lifesaver honestly.

Summarizing what everyone has said so far, it basically comes down to choosing between the big name reliability and the high cost that comes with it. I have been shooting with the R5 for a long time and tried a bunch of these cards, and honestly, you dont always need to pay the premium for the biggest brands. In my experience, if you want to save some cash without losing performance, the Angelbird AV PRO CFexpress B SE 512GB is the way to go. It handles 8K video perfectly and stays surprisingly cool compared to the more expensive options mentioned earlier. For the SD slot, the Sabrent Rocket v90 256GB SDXC is a total sleeper hit... it is fast enough for basically everything except the highest RAW video settings and costs way less than the Sony or SanDisk equivalents. Definitely worth considering if you are trying to be practical with your budget. Let me know if you end up going with one of those, happy to chat more about the R5 setup anytime!

SanDisk Extreme PRO CFexpress Card Type B is one of the best choice.

> What type of memory card (SD, CFexpress) would you recommend for optimal performance? Honestly, everyone jumps to the most expensive name-brand stuff immediately, but I learned the hard way that high price doesn't always mean it's reliable. When I first got my R5, I dropped a fortune on top-tier cards and one totally corrupted during a shoot. It was a complete disaster, ngl. Since then I have been way more cautious. I would suggest looking at ProGrade Digital CFexpress Type B Gold 512GB instead. It is way more cost-effective and has been super stable for me. Also, Angelbird AV PRO CFexpress B SE 512GB is worth a look if you are on a tight budget. Just be careful with random brands you find on sale, because losing files is the worst feeling ever. Make sure to check the sustained write speeds if you actually plan on shooting 8K... some cards claim they are fast but then throttle after a few minutes.