Best Memory Cards for Canon EOS R100
Nothing kills the excitement of a new Canon EOS R100 faster than seeing a “Busy” message during a precious moment or a “Card Full” error while filming 4K video. While the R100 is a fantastic entry-level gateway into mirrorless photography, its performance is strictly tethered to the speed of your SD card. I’ve tested dozens of cards across the RF-mount lineup, and for the R100, the SanDisk Extreme Pro remains the undisputed champion for balancing reliability with price.
Our Top Picks at a Glance
Best Memory Cards for Canon EOS R100: Detailed Reviews
SanDisk Extreme Pro UHS-I View on Amazon View on B&H
The SanDisk Extreme Pro UHS-I has been my “go-to” recommendation for years, and for the Canon R100, it’s a match made in heaven. Since the R100 features a single UHS-I slot, paying for more expensive UHS-II cards is often overkill. This card delivers write speeds up to 140MB/s, which is more than enough to handle the R100’s 6.5 fps burst rate without the buffer clogging up instantly. When shooting 4K/24p video, the V30 rating ensures consistent data flow, preventing dropped frames. I particularly appreciate SanDisk’s durability; these cards are shockproof and temperature-proof, which provides peace of mind when you’re out in the field. The only real downside is the flood of counterfeits online, so ensure you buy from a reputable seller. For 90% of R100 users, this is the only card you’ll ever need.
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Samsung PRO Plus SD View on Amazon View on B&H
Samsung entered the full-size SD card market with a splash, and the PRO Plus is a fantastic value play for R100 owners. You often find the 128GB or 256GB versions of this card priced significantly lower than SanDisk’s equivalent, yet the performance is nearly identical in real-world scenarios. With read speeds of 180MB/s and write speeds of 130MB/s, it handles the R100’s 24.1MP files with ease. I’ve found that Samsung cards are particularly resilient when it comes to long-term use; their 7-proof protection (including seawater and X-rays) is top-tier. If you’re a hobbyist who wants to stock up on a few cards for a long vacation without breaking the bank, this is your best bet. The only minor gripe is that the write speed is just a hair slower than the Extreme Pro in sustained burst shooting, but you likely won’t notice it on an entry-level body.
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Kingston Canvas Go! Plus View on Amazon View on B&H
If you’ve just spent your entire budget on the R100 kit and need a reliable card for as little as possible, the Kingston Canvas Go! Plus is the hidden gem of the industry. Don’t let the “Budget” tag fool you; this card still carries the V30 Speed Class rating, which is the minimum requirement for reliable 4K video recording on Canon cameras. In my testing, it maintains a very stable write speed that avoids the “recording has stopped automatically” error that plagues cheaper, unrated cards. While its maximum read speeds (170MB/s) are slightly lower than the premium options, it’s plenty fast for transferring photos to your laptop after a day of shooting. It does feel a bit more “plasticky” than the Sony or SanDisk options, but for the price of a couple of lattes, it’s an unbeatable way to get your R100 up and running.
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Lexar Professional 2000x UHS-II View on Amazon View on B&H
Wait, didn’t I say the R100 is a UHS-I camera? Yes, but hear me out. The Lexar Professional 2000x is a UHS-II card, meaning it has a second row of pins. While the R100 won’t shoot any faster with this card, your *computer* will. If you find yourself shooting thousands of photos or large 4K video files, offloading them at 300MB/s via a UHS-II reader is a life-changer compared to the 90MB/s slog of standard cards. This is for the user who values their time more than their money. It’s also a “future-proof” investment; if you eventually upgrade to an EOS R7 or R6 Mark II, this card will be ready to handle their much higher data rates. It’s significantly more expensive, but the build quality and the included SD card reader in the box make it a premium package for those who want the best of the best.
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Sony SF-E Series UHS-II View on Amazon View on B&H
The Sony SF-E series sits in a unique middle ground. It’s a UHS-II card, but it’s priced much closer to high-end UHS-I cards. For R100 users, this is a brilliant “secret weapon.” You get the reliability Sony is known for, plus significantly faster transfer speeds to your PC than the SanDisk Extreme Pro, without the eye-watering price of the Lexar 2000x. I’ve used these cards extensively in various Canon bodies and they are incredibly consistent. They also support Sony’s File Rescue software, which has saved my skin once or twice when I accidentally formatted a card before backing up. It lacks the “Tough” branding of Sony’s more expensive cards (so don’t go stepping on it), but for general travel and family photography with the R100, it’s a very sophisticated choice that offers a noticeable workflow boost.
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Buying Guide: How to Choose a Memory Card for the R100
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| SanDisk Extreme Pro | All-Rounder | ★★★★★ | Check |
| Samsung PRO Plus | Value Seekers | ★★★★☆ | Check |
| Kingston Canvas Go! | Beginners | ★★★★☆ | Check |
| Lexar 2000x UHS-II | Fast Workflow | ★★★★★ | Check |
| Sony SF-E UHS-II | Hybrid Use | ★★★★☆ | Check |
Frequently Asked Questions
Does the Canon R100 support UHS-II cards?
Yes, the Canon EOS R100 is backward compatible with UHS-II cards, but it does not have the extra row of pins in its card slot to take advantage of the faster speeds. If you use a UHS-II card, it will operate at UHS-I speeds (roughly 100MB/s max) inside the camera. The only benefit is when you put that card into a UHS-II reader on your computer, where you will see significantly faster file transfer speeds.
How much 4K video can I fit on a 128GB card?
The Canon R100 records 4K video at a bitrate of approximately 120Mbps. On a 128GB card, you can expect to fit about 2 hours and 15 minutes of 4K footage. If you are shooting in Full HD (1080p), you can fit significantly more—up to 8 hours depending on the frame rate. For a mix of photos and video, 128GB is generally considered the ideal starting point for most amateur photographers.
Why does my R100 stop recording video after a few seconds?
This is almost always due to using a memory card with a slow write speed. For 4K recording, the R100 requires a card with at least a V30 (Video Class 30) or U3 rating. If you use an older “Class 10” or “V10” card, the camera’s internal buffer fills up faster than the card can record the data, forcing the camera to stop. Upgrading to a SanDisk Extreme Pro or Samsung PRO Plus will fix this.
Can I use a MicroSD card with an adapter in my R100?
Technically, yes, you can use a MicroSD card with a full-size SD adapter. However, I generally advise against it for photography. Every extra connection point (the pins between the card and the adapter) is a potential point of failure or data corruption. Since full-size SD cards are roughly the same price as MicroSD cards, it is always safer to buy the standard SD size designed specifically for the camera’s slot.
Is 256GB overkill for the Canon R100?
It depends on your shooting habits. If you are going on a two-week vacation and don’t plan on bringing a laptop to offload photos, a 256GB card is a great “set it and forget it” option. However, for daily use, I prefer having two 128GB cards instead of one 256GB card. This follows the “don’t put all your eggs in one basket” rule; if one card fails or gets lost, you haven’t lost your entire trip’s worth of memories.
Final Verdict
For the vast majority of Canon EOS R100 users, the SanDisk Extreme Pro 128GB is the smartest investment you can make—it’s fast, reliable, and reasonably priced. If you are looking to save every penny for a new lens, the Kingston Canvas Go! Plus won’t let you down. However, if you find yourself frustrated by slow computer transfer speeds, stepping up to the Sony SF-E UHS-II card will save you hours of waiting at your desk.