A beginner upgrading a laptop hdd

tacit

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Feb 26, 2009
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Hi!

am a beginner but would like to upgrade my brother's laptop.

Does anyone here know which version of sata is used for toshiba satellite m70-192-psm71e? the product specification web page of toshiba has no info about this:
( http://eu.computers.toshiba-europe.com/innovation/jsp/SUPPORTSECTION/discontinuedProductPage.do?service=EU&BV_UseBVCookie=yes&PRODUCT_ID=111925#0 ).

i've read, somewhere on the 'net, that i can just simply replace my hdd since sata controllers and disks are all backward/forward compatible. but i noticed on the disk labels these info regarding voltage/current rating:
old 60 GB hdd originally supplied by toshiba (hitachi travelstar hts541060g9sa00):
5v / 1amp
new western-digital scorpio wd3200bevt :
5v / .55amp

is this a major issue or can i just replace the hitachi hdd with the new wd-scorpio?
pls help.
thanks!