Do such things exist? Ive been given a plain black rucksack to carry the laptop, but as soon as i put in my lunch, paperwork, pencil case, it weighs a ton. My shoulder is hurting after just a day of carrying it. I already have a crossbody bag i use with my purse, phone and everyday bits in it. Should I just use 3 bags? Or are there any good ideas anyone has? thanks