Hello folks.
Firmware
HDP_R3_FW_121PAL.zip
& presumably the R1 version shows:
~ # df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/root 76288 75140 1148 98% /
/dev/mtdblock/2 61440 10296 51144 17% /usr/local/etc
/dev/rd/0 40 40 0 100% /mnt/rd
Space on root, surprising!