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comment Safe way of synchronising Dropbox with backup
@user1301428 You are exactly right. I am talking only about the download part. I am not talking about uploading at all. The question is simply whether during the download part where either a new file is being downloaded from the dropbox servers or an existing file on the local system is being updated from the dropbox servers, is there ever even a short time period where the local copy is incomplete/inconsistent. If it works by making a local copy, updating that and then renaming then I guess not. But does it because that could be quite expensive space wise locally?
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comment Safe way of synchronising Dropbox with backup
The same issue arises when updating an existing file. The question is basically if dropboxes updates atomically (using locks or renaming or some other trick). So when the "updating file" symbol shows on the file icon, are the files intact (old version) until the new version is fully downloaded, at which point the file is replaced in full and the file attributes (time etc.) are updated too?
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comment Safe way of synchronising Dropbox with backup
@Ramhound You mean that the file is downloaded to a temporary location locally by dropbox and then renamed to the correct name when it is completely downloaded?
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comment Safe way of synchronising Dropbox with backup
No sorry. I mean files that dropbox is in the middle of copying from its online server to my local dropbox folder (see comments below the answer for example).
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comment Safe way of synchronising Dropbox with backup
How do you stop it from copying half synched files? I mean large files which dropbox is in the process of downloading to your dropbox folder.
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comment Safe way of synchronising Dropbox with backup
@Ramhound This is what I do at the moment but it means that it is rechecking every single file on both sides each time which is slow.
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comment Safe way of synchronising Dropbox with backup
This is great if true but... :) It seems hard to imagine how a 1GB file could just appear instantly in your local dropbox folder. Unless there is some clever locking mechanism.
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comment Safe way of synchronising Dropbox with backup
Right so that's the question. Can a large file ever be in the dropbox folder at location b half copied? Because I am copying from the local drive/dropbox folder at location B to the external drive.