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Differential backup unexpectedly larger than base file

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mongs
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Differential backup unexpectedly larger than base file

Hi,

I created a base file (~50BG) in February and have since made 3 differential backups. The first two are small (~1MB) and were made in February. The third backup is larger than the base file (53GB) and was made in April. However, I have definitely not changed all of the 175GB that I'm backing up. I've probably only changed ~10GB at most. I noticed in the progress box that it was compressing files that I have definitely not altered, moved or accessed.

Is this behaviour expected? If not, (taking a complete stab in the dark) it wouldn't be a bug that has anything to do with daylight savings, would it?

Ta!

Steve Lamerton
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Has

the daylight savings changed in your area since the base file was created?

mongs
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Yup, I'm in Melbourne,

Yup, I'm in Melbourne, Australia, so our clocks went back an hour on 5 April.

Steve Lamerton
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Ok

I'll see what I can do about this, but it is handled internally by 7-Zip and I don't remember seeing an option to change this.

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