Created attachment 3179 screenshots Having many removable media mounted in system Thnunar shows only 3 of them. screen1 shows gigolo window - all media are mounted. screen2 shows sidebar of thunar - only 3 are visible. screen3 desktop - the same situation only 3 are visible. screen4 window of '/media' folder all media are mounted and visible while sidebar shows only 3. right-click menu 'Send to' shows also only 3. screen5 window of 'open file dialog' from web browser - all media are visible. Webbrowser is smarter than tunar?? file /media/.hal-mtab contains only: /dev/sdb1 1000 0 vfat nosuid,nodev,uhelper=hal,uid=1000,umask=0077,shortname=winnt,utf8 /media/Foto-1 /dev/sdb2 1000 0 vfat nosuid,nodev,uhelper=hal,uid=1000,umask=0077,shortname=winnt,utf8 /media/Foto-2 /dev/sdb3 1000 0 vfat nosuid,nodev,uhelper=hal,uid=1000,umask=0077,shortname=winnt,utf8 /media/Foto-3
The partitions sdb1 and Foto-1 to Foto-3 are explicitely hidden in Thunar and xfdesktop if GIO/GVfs thinks they are not user-mountable. So if these are mountable by your non-root user, this could be a bug in GVfs. What are the Lenovo and SERVICEV003 volumes about? The screenshots don't tell anything about their nature (are they USB sticks, local partitions...?).
119 GB Filesystem, Lenovo and ServiceV003 are win7 partitions on my HDD, Foto-1, Foto-2, Foto-3, Foto-4 are partitions on external HDD connected via USB, WD Smartware is appears when external HDD is connected,and contains some win software for HDD lsusb: Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 1058:1110 Western Digital Technologies, Inc. Bus 002 Device 002: ID 17ef:480b Lenovo Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub hope it helps a bit.
Closing. Please reopen if still reproducible on an up-to-date system.