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I have the whish to secure my THONDERBIRD installation against Window chrash, using a D/ partion

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How to move a Thunderbird 115.9.0 installation from C:/AppData/roaming to a folder on to a new D: partion ? Should I do a new installation on the D:/ drive, and then copy emails, address lists and folders C: to D:/ Or what options do I have to preserve data.

How to move a Thunderbird 115.9.0 installation from C:/AppData/roaming to a folder on to a new D: partion ? Should I do a new installation on the D:/ drive, and then copy emails, address lists and folders C: to D:/ Or what options do I have to preserve data.

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> Or what options do I have to preserve data.

Your very best protection is regular, frequent backups. Without backups, moving the profile is of little value.

https://support.mozilla.org/en-US/kb/thunderbird-export