Ah, a fancy memo field where you want rich text formatting. There are third party software that will let you do that to Access memo fields.
Although it is true that hard disk space is cheap, that's not the issue. The issue is that your MDB file will grow and grow... and after a certain size, it will actually become corrupt. You will run the risk of losing your entire database. Does someone out there know the upper limit?
Your hard disk may be very large, but MDBs are not programmed to hold multiple GBs of data.
Michigan Dept. of Environmental Quality, Air Quality Division