ok so this router has probably been branded differently in EU/USA/RU. and there are different H/W versions

DSL-2750U H/W T1 board id=96328ang

Profile=generic-96328avng-8M - 64K - jffs2.bin
packages= b43, wpad-mini, + packages for extroot(blkid, block-mount,ext4-fs,usb-TESTING VARIOUS)

if you use a jffs2 64k image and not a squashfs image there is no jffs2 errors.
they dont have that image on the download section. so you have to build it and i coulden't get the chaos-calmmer15.1-imagebuilder to make a jffs2 image, so i used trunk source.

root@OpenWrt:~# df -h
Filesystem                Size      Used     Available    Use%  Mounted on
/dev/root                 6.6M      4.2M      2.4M         64%       /
tmpfs                    29.7M    536.0K     29.2M        2%       /tmp
tmpfs                   512.0K         0         512.0K       0%       /dev
root@OpenWrt:~#

its low on memory and usb not working ATM.
But it saves setting and works as wi-fi repeater/extender/switch.