Best Canon 7D Memory Cards

By Nathaniel Stephan
Last Updated: April 15, 2020
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Best Canon CompactFlash Memory Card

The Canon 7D has a single card slot and can use CompactFlash memory cards that are up to 128GB in storage capacity. Type I or II CF memory cards can be used and the camera is UDMA compatible.

The main feature to look at when comparing memory cards for the Canon 7D is read speed. For example, the fastest CF memory cards available will save minutes over slower cards when transferring a large number of images.

If you do not want to read explanations of specs, my CompactFlash card recommendation is:

SanDisk Extreme Pro CompactFlash Card 32GB

SanDisk Extreme 64GB CF Card

  • Read speeds up to 120MB/s.
  • Write speeds up to 85MB/s.
  • Water, x-ray, & shock proof.

Once you have a working CF card, expand your options with another lens. Check out the 8 Best Canon 7D lenses.

The best value CF card is likely to be either 64GB or 128GB. Smaller cards are going to be more expensive on a per GB of storage basis.

A professional card will not add a significant amount to the price. Pro cards have higher speeds and a better build quality.

Also, having a high-speed card will remove the need to buy another card if you upgrade your camera in the future.

Recommended CF Cards

Lexar Professional CompactFlash Card 1066X 32GB

Lexar Professional 1066x 32GB CompactFlash Card

  • Transfer speeds up to 160MB/s.
  • Video Performance Guarantee sepc VPG 65.
  • Limited lifetime warranty.
SanDisk Extreme CompactFlash card 32gb

SanDisk Extreme 32GB Compact Flash Card

  • Read speeds up to 120MB/s.
  • Write speeds up to 85MB/s.
  • Sustained data recording of 20MB/s.
  • Water, x-ray, & shockproof.
SanDisk Ultra CompactFlash Card 16gb

SanDisk Ultra 16GB CompactFlash Card

  • Speeds up to 50MB/s.
  • Excellent reliability and value.
  • Ideal for mid-range DSLRs.

Memory Card Reader

UGreen 4-in-1 Card Reader
There's a bright blue LED that bothered me. It is now covered in gaff tape.

The UGreen 4-in-1 memory card reader supports four common types of memory cards. These cover all card formats camera manufacturers use in all but their latest professional-level cameras.

The UGREEN memory card reader has a USB 3.0 connection. The USB 3.0 transfer speeds will be faster transfer speeds than what the Canon 7D can achieve in USB transfer mode.

There are plenty of favorable customer reviews for the UGREEN card reader, which I agree with. I think it is a good product because it has been compatible all the computers (Windows, Mac, and Linux) I have plugged it into.

The cable prevents memory card slots from getting in the way of other devices or accessories that are plugged in.

When I looked for a more compact card reader that would be lighter for travel, I had to go through the return process with multiple orders. I encountered the most common problem in customer reviews, the readers did not work with my computer.

The UGREEN card reader can be used with the memory cards below:

  • CompactFlash Cards
  • SD, SDHC, & SDXC Cards (UHS-I supported)
  • Memory Stick (MS), MS Pro, MS PRO-HG, & MS XC DUO
  • MicroSD, Micro SDHC, & Micro SDXC Cards

Compact Flash Card Types

Compact Flash cards come in two physical sizes. They are called Type I or Type II.

The difference between the types of cards is the thickness. The width and length of the CF memory cards are the same.

  • Type I - 3.3mm thick
  • Type II - 5mm thick

The Type II standard is wider to give enough room for a Microdrive to be used in the Canon 7D. A Microdrive was just a compact mechanical hard drive.

Compact Flash cards had small capacities when they were initially introduced to the market. Microdrives were a solution that allowed for larger amounts of storage.

Microdrives are no longer manufactured. They dropped out of favor because they were mechanical. It was a matter of use or time until they failed.

Some Compact Flash adapters make use of the Type II specification. An adapter can make it possible to use a SD or MicroSD card in a Compact Flash slot.

Avoiding Card Read Errors

The most wide-spread problem with cameras that use CF cards is bent memory card slot pins. When a pin is bent, you may see any of the following errors:

  • Err 02
  • Err CF
  • No CF

If you want to avoid bent pins, never force a CF card into the Canon EOS 7D. The extra room that allows a Type II card to be used makes it possible for a CompactFlash card to become misaligned.

If the CF card will not easily slide into the slot, remove it and check the orientation of the card. Also, check to see if the card is damaged.

If there is no damage, carefully position the card and try inserting it again.

Related Cameras

The best Canon EOS 7D memory card can also be used in the following cameras:

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