I have 433ah with 12 users network can i make proxy server what i need to do. I have 8gb micro sd card inside in rb 433ah can i use this space for proxy help me please thanks 
some one can help me with this please
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how to configure proxy: http://www.mikrotik.com/testdocs/ros/3.0/pnp/proxy.php
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to add the microSD card as the storage drive, use the “store” menu:
/store> add disk=sd type=web-proxy
where i shud write this code?
in the router 
[andriuxa@Kns-Vaidas] > store
[andriuxa@Kns-Vaidas] /store> add disk=sd type=web-proxy
input does not match any value of disk
[andriuxa@Kns-Vaidas] /store>>
we have 4gb micro sd HC
“disk=sd” was just an example, you don’t need to copy it directly
choose the name of your own disk
if you are not sure, type disk= and then hit [tab][tab] to see available options
nothing i thing the router not recognized disk he see only system disk
go into “/store disk” type “print” and see if it’s in there. if yes, format it from that menu
as you can see here, there could be some cards that are not supported by RouterBOARD:
http://wiki.mikrotik.com/wiki/Supported_Hardware#Memory_cards
Try to find another brand or size, and see if it works. if yes - please send to support list of cards that you tried, and the results.