If you want to use an external modem you have to take out the internal first. There are two main kinds of printers, inkjet and laser. Their consumables much cost less than inkjets' do. Hewlett Packard is the leader but has many worthy competitors. Color laser printers cost thousands without beating the best inkjets for quality.
All hard drives fail eventually.
Most hard drives hold files of great value to their users. Most users do not back up their data. As you are reading this, someone somewhere has just realized that they lost six months of work because they didn't back up their data. For more on this topic, see Peter Linde's excellent article on backing up . Copyright 1998 by Sam Penrose.