SamyGO

I had the same problem, then I made such things:

1) extract to USB stick both bftpd and bftpd.conf files
2) extract to USB stick 2 additional files: libcrypt.so.1 and libz.so.1 from SamyGO All Extensions v0.03.zip (if you have not installed them before)
3) insert USB stick
4) run telnet and for installation type:
As you can see, I prefer to use SamyGO subdirectory inside mtd_rwarea directory.

5) then for run type:
Thank you!

FTP daemon is working fine, but I realized that when huge files are copied - the TV is very lazy and remote control response time is quite long. I think, one more command has to be executed after bftpd process is started: we should set lower priority for bftpd process, i.e.:

1) Check PID of bftpd process using ps command (in my example PID=55)
2) use renice command for setting new (low) priority:
or alternatively, use nice command on init: Remote control performance seems to be a bit better after bftpd process' priority has been altered.
What do you think?

try it with full paths, had the same issue and i think with full path it worked

You were trying to execute... a directory!

Try this:
where nice -n +19 is optional thing described earlier

...and after testing, it is worth to create a loading script (ftp.sh for example) that may contain all neccessary shell commands. That script might be loaded in starting script to get ftp daemon always ready. That's what I have been done in my TV. FTP daemon is very useful for me.

If you would like increase writing speed over FTP, you haveto change default FTP setting in bftpd.conf
On my TV:
XFER_BUFSIZE="2048" cca 170kB/s
XFER_BUFSIZE="64000" cca 500kB/s