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When I connect the device to computer, it makes sdcard available to it, as in card reader.

How to make it share not sdcard, but other block device or file?

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  • I would assume that this is highly hardware dependent and impossible without writing and replacing drivers, at best. – Matthew Read Nov 15 '11 at 20:47
  • How it works? How to make "Use USB connection to transfer files" action manually, from console? – Vi0 Nov 17 '11 at 8:16
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On my device (Sony Ericsson Xperia X10) it is, for example:

echo /sdcard/debian.ext2 > /sys/devices/platform/msm_hsusb/gadget/lun0/file

After it the content of file becomes available on the host. Can write to sdcard file without unmounting it from android.

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