Why I am always use a big bag

There are many important reasons that why I use a big bag. First of all, I am alway use a big bag because I can put a lot of thing in my bag. For example, I can take a lot of book to school, and I can take my meal, too. Moreover, these bag is very strong, I feel comfortable when I run or walk. Finally, and importantly reason, these bag is only one I have because I just took three bags from Thailand. These bag is very good for me, but my friends doesn't think like that.