Backing up data on external media
If you don’t have access to an Internet connection (fast enough) to copy data, this is probably the easiest solution.
While DVD, CD-R, and even floppy disk media used to be well suited for this task, they are becoming increasingly scarce and are limited in their life span and capacity. Other media such as a USB stick or external hard drive are much more efficient and allow you to make a local backup copy of your files.
Depending on the type of media (USB-C , USB 2.0, USB 3.0, , HDD or SSD) the efficiency or speed may differ. But if you are not too hung up on this criterion, you can find suitable media at affordable prices.
Backup by dedicated software
Although external media is an excellent means of backing up, the disadvantage is that the process is not automatic and you will have to back up manually from time to time. This can result in unnecessary duplication of files or loss of data if you don’t have the chance to back up the most recent data.
This is where backup, synchronization, or automated backup software plays an important role. They allow you to automatically and regularly copy your data as you wish and thus free you from this manual backup routine.
In addition, they can allow incremental, differential or even full backups on the same data already backed up when you want to undertake one.