Sony CFExpress Type A <100MB/S Transfer Speed to M1 MBP

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Sony CFExpress Type A <100MB/S Transfer Speed to M1 MBP

I have a 160GB Sony CFExpress Type A TOUGH card that I use with a Delkin Devices CFexpress Type A & UHS-II SDXC Memory Card Reader connected to my M1 Macbook Pro (running the latest Ventura OS) to move RAW files from my A7IV. I purchased the setup approx. 4 months ago. If I recall correctly, I got around 500-600 mb/s when moving the files from the camera to my computer and sometimes directly onto my Sandisk Professional G-Drive 4TB SSD.

After a 2-month hiatus from photography work, I am now getting less than 100 mb/s speeds, doing the same workflow, and seemingly without any changes. During that same period, my Sandisk SSD became virtually inoperable (only 4 months old) and is now being replaced by Sandisk.

I ran a BMD disk speed test and selected the card connected with the reader as the target drive.... ~35mb/s read/write. I know this cannot be normal.

Can anyone help? Is this an issue with my computer?

MacBook Pro 16″

Posted on Aug 27, 2023 7:28 AM

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Answer 1

VikingOSX

Level 10

123,392 points

Aug 27, 2023 8:15 AM in response to michaelalpinephoto

Can you insert the UHS-II SDXC card into the SDXC slot on the side of the M1 Mac Book Pro and measure that transfer speed with BMD?

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Answer 2

Aug 27, 2023 8:20 AM in response to VikingOSX

The CF Type A card is not compatible with the SDXC slot. I have a Sony 128GB UHS-II card with a read speed of 277 mb/s. I tested transferring the from that Sony UHS-II card from both the internal Mac reader (SDXC slot) and an external reader. The speed difference was significant, with a 7GB transfer taking less than 60 seconds on the internal Mac reader and almost 20 minutes on the external (Delkin) reader.

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Answer 3

VikingOSX

Level 10

123,392 points

Aug 27, 2023 8:41 AM in response to michaelalpinephoto

Personal preferences notwithstanding, you might look into the new Crucial X10 Pro 4TB SSD that is a USB 3.2 Gen 2 drive offering 2000 MB/s rated speed instead of Sandisk drives.

I am unlikely to be of further help with your card usage as I don't use them, but do use Crucial X8 (1050 MB/s) drives for Time Machine backups or hosting Virtual Machine guests.

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Answer 4

ku4hx

Level 7

23,688 points

Aug 27, 2023 8:56 AM in response to michaelalpinephoto

My experience with all cards is they are dismally slow compared to a good quality portable SSD, and still lag behind a name brand HDD.

And that's not to even mention [un]reliability.

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Sony CFExpress Type A <100MB/S Transfer Speed to M1 MBP

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