Limiting new FTP users

what ftp do u run on the server ? proftp or pureftp ?

In case of pureftp; there is a file at /etc/pureftpd.conf

Inside it is a part as below:
===============
# Enable virtual quotas. The first number is the max number of files.
# The second number is the max size of megabytes.
# So 1000:10 limits every user to 1000 files and 10 Mb.

#Quota 1000:10
================
enable it and u can do what you want; But remember that this is a server-wide setting and the root user needs to do it.

Else you need to check for any .htaccess directive (not sure if it is there) to tweak for a user.

 

http://www.castaglia.org/proftpd/doc/contrib/ProFTPD-mini-HOWTO-Limit.html

try giving them this. just a try.. might help sometimes.