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How to Restore Library from Windows Backup
#11  theducks 09-20-2019, 05:48 PM
Custom Columns IS part of the metadata.DB

metadata_db_prefs_backup.json is the (empty)DB structure recovery.
It contains everything to make an empty Library just like the real one in that folder.

And every Title folder contains metadata.OPF the metadata for the book. cover.jpg is the cover that you selected for that book

User settings, plugins, optional icons are in the configuration folder.

KISS (and take the guesswork out)
Use the built in Export/Import too. It does all (selectable) KNOWN (on the quick switch list) Libraries AND all user configuration settings.

The reason some of the experts choose other ways have a lot to do the amount of time and data for a FULL export.
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#12  BetterRed 09-20-2019, 06:13 PM
Quote stumped
Why are you making a simple task so complicated?

The library is stored in a folder, which you can copy, like any other folder, to a different drive , or to cloud, or to a usb stick.
Then, if you ever need to , you can copy some or all of it back to its original location.

No special tools or skills required

But if you want to regularly update your backup copy, use one of several free file sync utilities in mirror mode, so your copy is always a mirror of your life library. Those take only a couple of minutes per day to make incremental changes

Ps. All configuration data is also in a single folder, and can be managed same way.
All of the above : ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔

File History folder content can only be restored with the File Explorer Previous Versions tool, which is accessible from the File Explorer context menu or via File Explorer Properties.

IMO, keeping mirror copies (as suggested by stumped) using a folder and file synch tool is the way to go ==>> Comparison of file synch software - Wikipedia.

Free File Synch is popular, I use GoodSynch.

Calibre's proprietary Export/Import feature was developed to facilitate moving calibre (libraries and configuration) between platforms (hardware, operating system, and file system), e.g from an 'old' computer to a 'new' computer. It can be used for backup/recovery, but, because it backs up entire libraries it is slow - which is a deterrent to doing frequent backups, particularly on large (byte-wise) libraries. And you can't easily recover single items (books, formats, covers, config files) it's all or nothing.

BR
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#13  stumped 09-21-2019, 01:31 AM
Quote BetterRed
All of the above : ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔ ↑ ↑ ↑ ✔



Calibre's proprietary Export/Import feature was developed to facilitate moving calibre (libraries and configuration) between platforms (hardware, operating system, and file system), e.g from an 'old' computer to a 'new' computer. It can be used for backup/recovery, but, because it backs up entire libraries it is slow - which is a deterrent to doing frequent backups, particularly on large (byte-wise) libraries. And you can't easily recover single items (books, formats, covers, config files) it's all or nothing.

BR
that was what i planned to add but BR got there first

much depends on future usage,
if you are in the habit of messing up and needing to recover specific books, then having a simple folder copy is better

if you main reason is to move or replicate the entire library on other devices then use export import

if you are not really paranoid, but the universe is out to get you - do both
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