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I have a HTC Desire rooted with CyanogenMod 7 and a 16GB microSD card.
When I copy great amount of data from Ubuntu 10.04 64 bits to this phone via USB, the speed is low (~1'2 MiB/seg) and sometimes the system doesn't respond during copy process.
It's very difficult determine where is the problem. Any clue?

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closed as off topic by fossfreedom May 22 '12 at 19:14

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

At launchpad there are various bug reports related to this for example: Once I was able to fix this by installing new (Debian) kernel (that wasn't patched by Ubuntu). – desgua May 2 '11 at 14:11
You are not alone. When writing to or reading from my 16GB micro SD card on my Android the read/write speed is slow. However, I have never experienced it stopping in between copies. It's always successful albeit slow as a turtle. One time, I was copying 5.7GB worth of data and it took several minutes (like 36min or more) just to finish writing to the micro SD card. – Marky May 2 '11 at 15:23
This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. – fossfreedom May 22 '12 at 19:14

That seems to be an inherent problem of writing to a memory card connected to the computer via a mobile phone. I face the same issue with my Nokia. I recommend you to get a card reader, to get marginally faster transfers, because that is what I do.

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But besides the slow, there is the serious problem of system doesn't respond from time to time while copying. – Juan Simón May 4 '11 at 9:42

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