LazySave is a proprietary backup

Backup

In information technology, a backup or the process of backing up is making copies of data which may be used to restore the original after a data loss event. The verb form is back up in two words, whereas the noun is backup....

 software for Windows first released in 1998.

LazySave is a screensaver

Screensaver

A screensaver is a type of computer program initially designed to prevent phosphor burn-in on CRT and plasma computer monitors by blanking the screen or filling it with moving images or patterns when the computer is not in use...

. It provides a feature rich interface enabling Duplication

Replication (computer science)

Replication is the process of sharing information so as to ensure consistency between redundant resources, such as software or hardware components, to improve reliability, fault-tolerance, or accessibility. It could be data replication if the same data is stored on multiple storage devices, or...

, Differential and Version Control backups. The latest version adds the ability to create a new folder each day if required. Most backup software is configured to run at specific times and so can be annoying if it slows down your computer

Computer

A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem...

. LazySave runs on your computer when you are not there, as it is a screensaver. As a consequence, the time between your files changing and your files being backed up, is minimised.