[mikefulton]

I am having a lot of trouble getting Calibre to talk to my Kindle Fire lately.

First, it takes *FOREVER* to read the list of files. Like nearly *THREE HOURS* in the latest attempt.

The error isn't always the same, but in this case, it failed at the end of the process of reading files. The job progress bar actually read 100% and I get this message:

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Failed to delete (u'Internal storage', u'metadata.calibre') with error: 2:PTP Layer error 02ff: LIBMTP_Delete_Object(): could not delete object.
2:Error 02ff: PTP: I/O error

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 87, in run
File "site-packages/calibre/gui2/device.py", line 503, in _books
File "site-packages/calibre/devices/mtp/driver.py", line 275, in books
File "site-packages/calibre/devices/mtp/driver.py", line 301, in write_metadata_cache
File "site-packages/calibre/devices/mtp/base.py", line 24, in synchronizer
File "site-packages/calibre/devices/mtp/unix/driver.py", line 366, in put_file
File "site-packages/calibre/devices/mtp/base.py", line 24, in synchronizer
File "site-packages/calibre/devices/mtp/unix/driver.py", line 411, in delete_file_or_folder
DeviceError: Failed to delete (u'Internal storage', u'metadata.calibre') with error: 2:PTP Layer error 02ff: LIBMTP_Delete_Object(): could not delete object.
2:Error 02ff: PTP: I/O error

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I've already reset my Kindle back to factory defaults once, but after I did that I haven't been able to get all my books back onto the device.

From the message it appears that Calibre is actually writing some file 'metadata.calibre' to the device, in addition to whatever books it's copying. Is that correct?