For 10 years as an expediter I took the do it yourself approach to bookkeeping, developing spreadsheets (which I know how to do) and a filing system for receipts. I did so out of stubbornness. I resisted the idea of putting data in the cloud. I resisted the idea of storing my info where a third party might get at it. As an expediter, I had a lot of free time so I was willing to pay the time and trouble price my homemade bookkeeping system required.
The internet has come a long way since then as have encryption resources. If I had it to do over again with the technology available today, I'd use a
QuickBooks Online product, an additional encrypted data storage site and an external backup drive. That streamlines bookkeeping with a state-of-the-art program that eliminates the need to use non-standard, made-up schemes like TeamCaffee describes and like I used then. Learning and following the QuickBooks way gives you the ability to access data of any type faster and easier than anything a non-standard scheme can provide.
Use your phone, tablet or a scanner to digitize your receipts. Store the hard copies if you wish (not required by the IRS if you have scanned copies).
Arrange your files such that an entry -- say a fuel purchase -- into your computer or tablet or phone automatically syncs to the cloud and to the encrypted storage area. From time to time, back up your stored data from your computer or the cloud (they are synced) to the external hard drive. Leave the external drive disconnected from the computer at all times unless you are backing up or retrieving data to it or from it. That keeps your data safe from hackers. If a ransom hijacker takes over your computer, wipe the machine clean, reinstall your software and recover your data from the external drive or cloud.
The external drive also protects you from your own human error. If you accidentally wipe out a major portion of your data, that change will sync throughout your system, except for the disconnected external drive. If such a thing happens, you can use your external drive to restore your data.
This scheme provides easy bookkeeping, a superior ability to view or analyze your expenses, all the business finance tools you need, and protection from events like computer crash or loss, hard drive loss, cloud file loss, the inability to access the internet for an extended period of time, and a truck or house fire in which you lose your computer and external drive.
Once you learn your way around QuickBooks Online, you'll have a state-of-the-art system and increased credibility in the event of an audit. The down side of QuickBooks Online is the monthly fee and the learning curve. The down side of the old system I used was the greater amount of time I put in to develop it in the first place and then use it, and the inferior ability that system had to analyze our business.