A backup is a copy of data that is written to a different location than the original data. By saving them in any medium or device other than the original in case of loss or destruction we can recover them without major problem.
It is very important that the copy is made in a different place than the one that contains the primary files. If, for example, our documents are stored in a folder on our laptop, we must copy them to an external drive such as a pendrive. This would be one of the options to keep them safe and be able to recover them if a problem arises and they are lost, but there are many more.
If we make a backup on the same device that we are using and it breaks down, we will lose both the original documents and the backup ones. Therefore we can say that a backup is a backup or a reserve copy.
All businesses should have a backup if they want to have peace of mind when it comes to document storage. Where we store our backups has changed a lot over time. In computer science prehistory, backups were made on a device called a floppy disk and whose maximum capacity was 1.44Mb, inconceivable today.
Fortunately, apart from physical storage devices such as external memories, we also have Dropbox, OneDrive, Google Drive, Box, etc … All of them offer us limited virtual storage space. They are also expandable depending on the amount and size of the files that we need to save. This type of storage is known as Cloud. In order for the Cloud to function correctly, our internet connection must be good both for uploading files to save them and for downloading them.