Valka,
A document file, unless it contains a lot of graphics will be rather small compared to some files. I think a 313 page document wouldn't even be a megabyte using Word or some other similar word processing program. Especially with large fonts. I routinely look at large document files which are less than a megabyte.
So a 4 GB USB flash drive will most likely be more than adequate to store your document, and a whole lot more. I was at Staples lately, and they had 16 GB flash drive, which are much bigger, for less than $15 CDN. If you get them on sale they can be as cheap as $10.
A document file, unless it contains a lot of graphics will be rather small compared to some files. I think a 313 page document wouldn't even be a megabyte using Word or some other similar word processing program. Especially with large fonts. I routinely look at large document files which are less than a megabyte.
So a 4 GB USB flash drive will most likely be more than adequate to store your document, and a whole lot more. I was at Staples lately, and they had 16 GB flash drive, which are much bigger, for less than $15 CDN. If you get them on sale they can be as cheap as $10.