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Old 04-15-2025, 02:01 PM   #946
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Originally Posted by j.p.s View Post
In general, EPUB from KindleUnpack of azw3 and azw3 split from kindlegen dual mobi generated from EPUB are all comparable in size. In some relatively rare cases there might be a significant size discrepancy.
I think in mast cases, the significant size discrepancy is most likey due to the ePub having the full graphics and then KF8 having doctored images.
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Old 04-15-2025, 02:02 PM   #947
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OK.


Crazy people.
Also IMO "download charges" should only apply to cell/mobile delivery, not WiFi. I guess historic from K1, K2 and DX family.
Amazon does not pay delivery charges for delivering via the net. If Amazon says otherwise, they are lying.
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Old 04-15-2025, 02:30 PM   #948
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I guess it is possible from an older Kindle like the Keyboard Kindle, as it would be for those files downloaded via Download & Transfer via USB, but I certainly wouldn't copy the folder structure and files in any case.
For what it may be worth, files downloaded via D&T were tied to one device and its serial number. You would have to remove DRM and then move them to another Kindle at which point, sync would not work.

I suspect that files transferred from another Kindle would have the same issue.
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Old 04-15-2025, 03:13 PM   #949
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Quote:
Originally Posted by j.p.s View Post
I've never tried conversion to or from KFX and never used any amazon server based conversion/delivery of personal documents.
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Originally Posted by JSWolf View Post
I think in mast cases, the significant size discrepancy is most likey due to the ePub having the full graphics and then KF8 having doctored images.
For the cases I was referring to, you think incorrectly.

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Amazon does not pay delivery charges for delivering via the net. If Amazon says otherwise, they are lying.
That doesn't stop them from charging.
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Old 04-16-2025, 05:30 PM   #950
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For what it may be worth, files downloaded via D&T were tied to one device and its serial number. You would have to remove DRM and then move them to another Kindle at which point, sync would not work.

I suspect that files transferred from another Kindle would have the same issue.
Yes, that would indeed be the case I reckon. So not as simple as I probably made it sound, as it would have required the extra DeDRM or NoDRM step via calibre.
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Old 04-17-2025, 04:34 PM   #951
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Just got bitten by this for the first time. Looking on my pw4 I see that a .kfx has been downloaded. How can I deal with that and get it into Calibre?

Dave
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Old 04-17-2025, 05:00 PM   #952
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Quote:
Originally Posted by dhdurgee View Post
Just got bitten by this for the first time. Looking on my pw4 I see that a .kfx has been downloaded. How can I deal with that and get it into Calibre?

Dave
You need the deDRM plugin 10.0.9 or alpha and the KFX Input plugin for Calibre.
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Old Yesterday, 01:49 PM   #953
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You need the deDRM plugin 10.0.9 or alpha and the KFX Input plugin for Calibre.
Thank you. I gave that a try, but I get an error about DRM. Given this I assume this is one that cannot presently be handled.

Dave
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Old Yesterday, 01:52 PM   #954
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Thank you. I gave that a try, but I get an error about DRM. Given this I assume this is one that cannot presently be handled.

Dave
Plug your Kindle into the USB and drag/drop the .kfx file to calibre and see if that works. If you are copying the .kfx off of the Kindle and then adding to calibre, that will not work.

KFX is made up of multiple files. So you have to drag/drop the .kfx file from the source directory so the KFX Input plugin can grab all of the various files and merge them together in the .kfx file.
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Old Yesterday, 02:28 PM   #955
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Originally Posted by JSWolf View Post
Plug your Kindle into the USB and drag/drop the .kfx file to calibre and see if that works. If you are copying the .kfx off of the Kindle and then adding to calibre, that will not work.

KFX is made up of multiple files. So you have to drag/drop the .kfx file from the source directory so the KFX Input plugin can grab all of the various files and merge them together in the .kfx file.
You were correct, that did the trick.

I'm debating how to deal with this problem in the future. Which firmware level added KFX support? I am considering downgrading to a firmware that would force Amazon to provide an AZW3 instead.

Dave
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Old Yesterday, 02:33 PM   #956
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You were correct, that did the trick.

I'm debating how to deal with this problem in the future. Which firmware level added KFX support? I am considering downgrading to a firmware that would force Amazon to provide an AZW3 instead.

Dave
For the PW4 it always had KFX support. There's no going back past the original firmware.

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Old Yesterday, 03:33 PM   #957
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Which firmware level added KFX support? I am considering downgrading to a firmware that would force Amazon to provide an AZW3 instead.

Dave
5.6.5 or soon after.

Only PW3 and earlier can be downgraded to this.
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Old Yesterday, 06:40 PM   #958
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5.6.5 or soon after.

Only PW3 and earlier can be downgraded to this.
No doubt on the general principle of all gadgets; that you rarely can install a FW earlier than the FW at release / launch.

Really to have azw3 rather than KFX you need a K3 to PW1 inclusive. They never got KFX. The K3 got azw3 on an update.
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