Autosave

The autosave feature stores the edited osm layer in regular interval so that the work can be recovered in case of a crash.

Recuperar los cambios

You simply need to restart JOSM and it will offer to open the recovered files.

You can also find the backup files in the JOSM preferences folder (subfolder autosave), where JOSM stores them.

(See this page on how to locate the preference folder.)

Q&A

• How often does it save?

Depends on your settings, default is every 5 min (at time of writing).

• How does it know that JOSM crashed?

It keeps backups that are deleted, whenever a data layer is closed gracefully. If backup files are found on start, JOSM will assume that it crashed.

Preferencias

Ir a Preferencias -> Ajustes del mapa (proyeccción del mapa y la interpretación de datos) -> pestaña "Archivo de respaldo".

Ahí tu tienes las opciones

• to disable autosave altogether
• to set a custom value for the time interval.
• to set a custom value for the number of backup files per data layer (Default 1). If you increase it to 2, JOSM will not only save the last snapshot of your changes, but also the last but one (in case it differs from the last, otherwise an even older snapshot, if available).