[boxcorner]

Sony PRS-650
Calibre 0.7.56

I have used Calibre previously, numerous times, without difficulty.
Now I keep getting the following error, each time I connect the USB cable:

[Errno 30] Read-only file system: '/media/READER/database/cache/media.xml'

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 64, in run
File "site-packages/calibre/gui2/device.py", line 317, in _books
File "site-packages/calibre/devices/prs505/driver.py", line 183, in books
File "site-packages/calibre/devices/usbms/driver.py", line 218, in books
File "site-packages/calibre/devices/prs505/driver.py", line 209, in sync_booklists
File "site-packages/calibre/devices/prs505/sony_cache.py", line 724, in write
IOError: [Errno 30] Read-only file system: '/media/READER/database/cache/media.xml'

Any ideas?

Addendum
Ah, I remember now ... something like this happened ages ago, soon after I got the reader. I eventually solved the problem by reformatting the Internal Memory. Perhaps in future it would be better to store books on Memory Stick or SD Card. Meanwhile, apart from not communicating via USB, the reader works fine.