On my nextcloud instance I have files, contact, task and calendar. I have migrated the data on an external storage to get more space.
My server crashed and I am currently restoring the application. But I have some troubles. I succed in reach my files from nextcloud, but I have no contact, tasks and calendar data…
Can you say me where I can find these data and restore it ?
in general databases are pretty solid and build with data safety in mind… often recovery is possible… please look for the recovery/emergency migration procedure of the database you used.