Your Machines+People client data files will contain highly sensitive data that might be devastating to a client if used with malicious intent. The data files are encrypted using AES-128 encrytion but you must choose the password. This application is intended to be run from a USB thumb drive where you carry it with you from machine to machine. You keep it securely in your possession at all times. You do not walk away from a machine without first ejecting the thumb drive and taking it with you. The client data files you will be using should be copied to the thumb drive in advance of leaving your office.
If you are an IT support company with consultants in the field then you will likely need to come up with a way to get the data file to your consultant during the course of the day. How you do that is up to you. One of the popular file sharing services may work or you may have your own file server. There are some newer services that will provide the level of security necessary. The idea is to be able to get the data files when you need it and sometimes there's no advance warning.
No matter what your circumstance you will need to get the data files backed up one way or another. If they reside on a server or file sharing service then perhaps that gets backed up as part of a routine. If however, you are accustomed to carrying the data files around with you in your pocket on a thumb drive you must, absolutely must, get them into a backup one way or another.
