The Canon 70D uses SDXC, SDHC, and SD memory cards. You will not gain any advantage from a UHS-I card, but it will be useable in a future camera upgrade.
Cards that can be used with the 70D include any SD card that has a memory size of 2TB or less. Bear in mind that older SD and SDHC cards will have slower transfer speeds, which may negatively impact the camera's capabilities.
Just want a compatible card? Here's my recommendation for the best memory card:
16 GB or 32 GB cards are inexpensive and large enough for photos.
64GB or larger cards are a better choice for video.
With a memory card, you can expand your capabilities with a new lens. Take a look at the 8 Best Canon 70D lenses.
Best SD Cards
SanDisk, Lexar, and PNY are manufacturers that produce high-quality Memory cards. The best memory cards I have used have been the SanDisk Extreme Pro SD cards.
You do not need to purchase a card made by SanDisk for your Canon 70D. Make sure the name sounds cool. That will make sure you get fast transfer rates, water resistance, and more professional features.
I have not run into issues with Lexar Professional or PNY Elite Performance memory cards.
Any problems I have experienced with SD cards has been when I have used cheap no-name brands. A low-cost card increases the possibility of card errors or data corruption.
If you would like to spend less money, don't buy a cheap card. You will be better off buying a high-quality memory card with a smaller capacity.
Recommended SD Cards
SanDisk Extreme Pro 128GB SD Card
- Best value for the money.
- Capacities from 32 GB to 2TB.
- Transfer speeds up to 170 MB/s.
- Class 10 & UHS-I
- Temperature Proof, Water Proof, Shock Proof, and X-ray Proof.
- Lower priced card.
- Transfer speeds up to 95 MB/s.
- Class 10 & UHS-I.
- Magnet Proof, Shock Proof, Temperature Proof, Waterproof.
- Lexar Professional Silver Card.
- Transfer speeds up to 160 MB/s.
- Class 10 & UHS-I.
- Includes Lexar Recovery Tool Software.
- Designed for durability in harsh conditions.
Canon Rebel 70D SD Card Compatibility
SD, SDHC, and SDXC cards are compatible with the Canon 70D.
Four different specifications of Secure Digital (SD) memory cards exist. New card specs add features that provide for greater storage capacity and improved read/write rates.
- Secure Digital (SD) - 128MB to 2GB.
- Secure Digital High Capacity (SDHC) - 4GB to 32GB.
- Secure Digital eXtended Capacity (SDXC) - 64GB to 2TB.
- Secure Digital Ultra Capacity (SDUC) - 4TB to 128TB.
Here is an estimation of how many large JPEGs you can expect to fit on a card:
- 4GB - 1,160 images
- 8GB - 2,320 images
- 16GB - 4,640 images
- 32GB - 9,280 images
Speed, Class, & UHS Ratings
The speed rating of an SD card is based on sequential read and write speeds. The speed of a card is very important for video and continuous shooting.
Slows cards can cause a decrease in the number of continuous frames the Canon 70D can capture. This is because the camera's buffer is not able to write data to the card fast enough.
When shooting video, a slow SD card can cause a sudden end to shooting. The video file may also end up being corrupted. If you are going to capture video, it is essential the card you use meets the required minimum continuous write speed for video.
Read speed is important for file transfers to a computer. If you have cards that are full, a memory card with a fast read speed will cut down on the amount of time it takes the transfer to complete.
Speed Class Rating
The Class rating of a memory card is based on the sustained write speed. Cards that have a minimum write speed of at least 10MB/s will be rated as Class 10.
- Class 2 - 2MB/s
- Class 4 - 4MB/s
- Class 6 - 6MB/s
- Class 8 - 8MB/s
- Class 10 - 10MB/s or faster
Every name-brand card that you can purchase online will be rated Class 10. You can check the class rating of a card by looking for a number inside of a C on the label.
Ultra High Speed (UHS)
The Ultra High Speed (UHS) bus can be found in SDXC And SDHC cards. UHS allows cards to achieve faster transfer rates.
There are 3 different specs. They are UHS-I, UHS-II, and UHS-III.
Look at the label to figure out the rating of a card. If the SD card has UHS a roman numeral I, II, or III will be on the label.
- UHS-I - Maximum transfer rate of 104 MB/s
- UHS-II - Maximum transfer rate of 312 MB/s
- UHS-III - Maximum transfer rate of 624 MB/s
Now that you what specs the camera needs you can see why the SanDisk 64GB Extreme Pro is the best Canon 70D memory card. This will also help you find an SD card for your future cameras.
Here are more pages on cameras related to the 70D: