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<blockquote data-quote="Slydude" data-source="post: 1927134" data-attributes="member: 131855">In the past, backup programs have often used some form of disk image (generic or proprietary) to store a backup of the source disk. As you probably know, a disk image strives to create an exact copy of the source disk.The problem with most disk images is that, once they are created, the size of the file isn't easily changed without recreating the image file from scratch. Suppose for a moment a disk image is created with enough room for 10 MB of data. Everything's fine until I need to backup more than 10 MB of data. Making room for more data usually means creating a new image file. If I need less that 10 MB that space is wasted.The advantage of sparsbundle files is that you have the best of both worlds. They are essentially dynamic image files. The image expands and contracts as needed depending upon the space needed to house the backup. [URL unfurl=&quot;true&quot;]https://eclecticlight.co/2020/04/27/sparse-bundles-what-they-are-and-how-to-work-around-their-bugs/[/URL]</blockquote>

[QUOTE="Slydude, post: 1927134, member: 131855"] In the past, backup programs have often used some form of disk image (generic or proprietary) to store a backup of the source disk. As you probably know, a disk image strives to create an exact copy of the source disk. The problem with most disk images is that, once they are created, the size of the file isn't easily changed without recreating the image file from scratch. Suppose for a moment a disk image is created with enough room for 10 MB of data. Everything's fine until I need to backup more than 10 MB of data. Making room for more data usually means creating a new image file. If I need less that 10 MB that space is wasted. The advantage of sparsbundle files is that you have the best of both worlds. They are essentially dynamic image files. The image expands and contracts as needed depending upon the space needed to house the backup. [URL unfurl="true"]https://eclecticlight.co/2020/04/27/sparse-bundles-what-they-are-and-how-to-work-around-their-bugs/[/URL] [/QUOTE]

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