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Incremental always does full when I add folder to selection

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As True Image crashes when I select everything (around 1.2TB) for backup to my NAS, I thought I'd do it in steps by first selecting only part of the folders, doing a full backup, then progressively more folders and run incremental backups, but True Image always does a new full backup when I add a folder to the selection, even though nothing has changed in the already backuped folders.
Is this normal or a monumental bug?

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This is normal behavior, the app must create a full backup then all inc. are based on that full backup.

I see no sense in doing a full backup of 500 unchanged GB of data when I add a 5GB folder to the selection! I haven't seen any other backup software behaving like this (and I have been using some of them professionally for years!).
If this isn't possible, then make TI2015 not hang when I do the first full backup of 1.2TB ... otherwise the software is just useless and I'll ask a refund for my upgrade and look for another product.

Carlo Didier wrote:

I see no sense in doing a full backup of 500 unchanged GB of data when I add a 5GB folder to the selection! I haven't seen any other backup software behaving like this (and I have been using some of them professionally for years!).
If this isn't possible, then make TI2015 not hang when I do the first full backup of 1.2TB ... otherwise the software is just useless and I'll ask a refund for my upgrade and look for another product.

Hanging likely has more to do with your router, your NAS and the network connection between them, than it does with any deficiency in ATI.

If the backup is a disk image type or a partition type backup, any new folder will automatically be included by the next incremental. This will be automatiac without you doing anything other than making sure the backup runs.

if the backup is a files or folder backup, then much will depend upon where the changes occur.

If you tell the program to include your Docs folder as part of the full backup, and you later add a new folder inside the docs folder, then the change will be auto included in next incremental and requires no action by you.

However, if your folder change is on a root directory or something that was not included in the prior directory tree of the full,
then, in order for it to be included, the next backup will be a full.

Tthe program allows for edits to an existing task, but unfortunately because of the edit, the next backup will be a full backup.

@tuttle: Then why does no other backup program I tried have this problem?

@GroverH: Thanks for the explanation. It's a folder backup. But again, none of the other backup applications I know or tested behaves like that. And it's not logical anyway. The folders selected for the first full backup did not change when I added the next folder(s), so it makes absolutely no sense at all to redo a full backup of those. Anyway, as TI2015 can't do a full backup of all the data without hanging somewhere halfway through, I'll just scratch it and use something else. TI2014 was way better anyway. At least, it did do the full backup of all the folders without hanging.