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SD card readers


Active Member
The card reader on my iMac has become dodgy - the pins obviously aren't connecting correctly.

I've bought a cheap reader off ebay that claims read speeds of 4mbs. Is this also the transfer speed...because that tops out at 1 mbs. A 14gb file estimates at 4 hrs! The internal sd reader on my netbook transfers it in 20 mins...as would the iMac if it was working.

Are there any usb plug in external sd card readers that will reach those speeds or is the bottleneck elsewhere? Eg the usb port?


Distinguished Member
A USB2 port is good for about 30MB/s (that's 240Mb/s) so if you're getting such low speeds on cards you know are faster then it's likely to be the card reader at fault.

I can't recommend a specific model from experience, but if you look for one that lists the format it supports and is up to date (I think SDXC is the latest one) then that's usually a good indication it's half-decent. Although they're pretty cheap anyway so I'd just pick up the latest model from the likes of Transcend for a tenner if you're using it a lot.


Active Member
Thanks. Have checked my old cf card reader and it transfers at 10 mbs so it's obviously just the one from ebay is poor quality.

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