as nobody answers I try to continue, but I have no idea about pcmanfm, because I hate pcmanfm
first can you post the output of: $ df - as an example my output:
tux@slitaz:~ $ df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 646360 280 646080 0% /run
tmpfs 1163452 462672 700780 40% /
devtmpfs 427892 0 427892 0% /dev
tmpfs 646360 0 646360 0% /dev/shm
/dev/sdb2 21212392 13920532 6214308 69% /home
/dev/sdb1 2030928 35792 1891968 2% /media/slitaz-root
/dev/sdb3 7529084 147872 6998748 2% /media/save
/dev/sdc1 7827424 7166388 661036 92% /media/BOOTCD_USB
/dev/sda3 15217664 168816 14275832 1% /media/sda3-ata-PHOTOFAST18CF_32
/dev/sda2 5477920 1341056 4136864 24% /media/sda2-ata-PHOTOFAST18CF_32
/dev/sda1 9438156 6288377 3149779 67% /media/sda1-ata-PHOTOFAST18CF_32
second the output of: ls -l /folder of your fstab disk
as an exemple - spacefm und udevil mounts evrything in /meda - it should be something like this
tux@slitaz:~ $ ls -l /media
total 28
drwxr-xr-x 29 tux users 8192 Jan 1 1970 BOOTCD_USB
drwxr-xr-x 2 root root 40 Jan 17 2013 cdrom
drwxr-xr-x 2 root root 40 Jan 17 2013 flash
drwxr-xr-x 3 root root 4096 Dec 4 2013 save
drwxrwxrwx 1 tux users 4096 Jan 25 13:02 sda1-ata-PHOTOFAST18CF_32
drwxr-xr-x 9 tux users 4096 Jan 1 1970 sda2-ata-PHOTOFAST18CF_32
drwxr-xr-x 3 root root 4096 Aug 16 2013 sda3-ata-PHOTOFAST18CF_32
drwxr-xr-x 3 root root 4096 Dec 4 2013 slitaz-root
drwxr-xr-x 2 root root 40 Jan 17 2013 usbdisk
and third output as root of #fdisk -l
root@slitaz:/home/tux1 fdisk -l
Disk /dev/sda: 32.0 GB, 32019316736 bytes
255 heads, 63 sectors/track, 3892 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1285 10319836+ 7 HPFS/NTFS
/dev/sda2 1285 1969 5488640 c Win95 FAT32 (LBA)
/dev/sda3 1969 3893 15460352 83 Linux
Disk /dev/sdb: 32.0 GB, 32015679488 bytes
64 heads, 32 sectors/track, 30532 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 2 2016 2063360 83 Linux
Partition 1 does not end on cylinder boundary
/dev/sdb2 2017 23062 21551104 83 Linux
Partition 2 does not end on cylinder boundary
/dev/sdb3 23063 30532 7649280 83 Linux
Partition 3 does not end on cylinder boundary
Disk /dev/sdc: 8032 MB, 8032092160 bytes
255 heads, 63 sectors/track, 976 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 * 1 977 7843808+ c Win95 FAT32 (LBA)
Partition 1 has different physical/logical endings:
phys=(975, 254, 63) logical=(976, 130, 50)
this would help to check, if there is something wrong with permission
and lst but not least can you install spacefm and tell if you have the same problems there....