Practicals are mostly three to four hours straight every once a week or a fortnight - you get use to it and you can walk out of class and back in for a break (well at least for biology and molecular biology anyway).
Are you serious? You can walk out on your own breaks? Wth ? How so... What are practical lessons like anyway?
Yes, I'm serious - but you're asked to limit them to 15ish minutes. Practicals? Tiring but fun and some practicals are just so time consuming that if you don't organise it well you're going to have to stay back. Depends on the lab partner or group you have as well - if they stuff up that experiment then it stuffs up the whole class because in biology for example you do weekly reports based on a collaboration of results. My tip is to balance fun and hard work in the labs.
Will usyd end up sending me the finalised copy of my timetable to my email. Cause its all set and done, but the only way I access it is through the portal.
Nope, they won't email it to you. I'd suggest printing the page if you want a hard copy, or taking a screenshot and saving the picture if you want to have a soft copy. Saves you from constantly logging in and stuff.