The Canon EOS 30D 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 30D is UDMA compatible.
The main thing to look at when comparing memory cards for the Canon 30D is read speed. For example, the fastest CompactFlash memory cards available will save time over slower cards when transferring many photos.
If you don't want to read explanations of specs, my Recommended CF card is:
- Fastest card available and largest supported capacity.
- Read speeds up to 160MB/s.
- Write speeds up to 150MB/s.
- Water, x-ray, & shock proof.
Once you have a memory card, expand your creativity with another lens. Check out the 7 Best Canon 30D lenses.
Best CF Cards
The best value Compact Flash card is going to be either 32GB or 16GB. Smaller or larger cards are going to be more expensive per GB.
A professional card does not add a noticeable amount to the price. Having a high-speed card will remove the need to replace the card with a camera upgrade.
Recommended CF Cards
- Transfer speeds up to 160MB/s.
- Video Performance Guarantee sepc VPG 65.
- Limited lifetime warranty.
- Read speeds up to 120MB/s.
- Write speeds up to 85MB/s.
- Sustained data recording of 20MB/s.
- Water, x-ray, & shockproof.
- Speeds up to 50MB/s.
- Excellent reliability and value.
- Ideal for mid-range DSLRs.
Compact Flash Card Types
Compact Flash cards come in two physical sizes. The cards are known as Type I or Type II.
The only difference between the types is the thickness of the cards. The width and length of the cards are the same.
- Type I - 3.3mm thick
- Type II - 5mm thick
The Type II spec allowed for the use of Microdrives in the Canon 30D. A Microdrive was a little mechanical harddrive.
When Compact Flash cards were first released they had high prices and had limited storage capacities. Microdrives made it possible to get larger amounts of storage.
Microdrives are no longer manufactured. Due to their mechanical nature, they often failed.
Another usage of the Type II slot is for Compact Flash card adapters. The adapters allow you to use MicroSD or SD cards in a Compact Flash slot.
Memory Card Reader
The UGreen 4-in-1 memory card reader can handle four memory card formats. These include all card types camera manufacturers make use of in all but their latest professional-level cameras.
The UGREEN reader connects over USB 3.0. Transfer speeds over USB 3.0 will have faster transfer rates than what the Canon 30D can reach using the USB transfer mode.
There are overwhelmingly positive customer reviews for the card reader, which I agree with. I would recommend it because the card reader has been compatible all the computers (Windows, Mac, and Linux) I have used with it.
The cable prevents memory card slots from interfering with other accessories or devices that are plugged into a laptop or desktop.
When I looked for a more compact card reader that would be lighter for travel, I needed to return a couple of orders. I experienced the most commonly seen problem in customer reviews, the readers would not work with my computer.
The card reader can use the following memory cards:
- 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
Avoiding Card Read Errors
One of the most common problems with cameras that use Compact Flash cards are damaged card slot pins. When a pin is bent, you may see any of the following errors:
- Err 02
- Err CF
- No CF
To avoid damaged pins, do not force a Compact Flash card into the Canon EOS 30D. The extra space for a Type II card enables for a Compact Flash card to be misaligned.
If the CF card will not easily slide into the slot, take it out and check the positioning of the card. Also, check to see if the card is damaged.
If everything looks fine, carefully position the CF card and try inserting it again.
The best Canon EOS 30D memory card can also be used in the following cameras: