additional information after chat with OP about the file size of syslog: it seems that the turning of the syslog file at size of 20 MByte does not work in this situation; she transfered the attached file by SCP to her netbook and when this ended, the syslog file in the BQ was already grown to 500 MByte; this explains why "no space left" in has in addition the risk that such a device is not booting anymore!!!
additional information after chat with OP about the file size of syslog: it seems that the turning of the syslog file at size of 20 MByte does not work in this situation; she transfered the attached file by SCP to her netbook and when this ended, the syslog file in the BQ was already grown to 500 MByte; this explains why "no space left" in has in addition the risk that such a device is not booting anymore!!!