Visvanath Ratnaweera

Auf Moodle 3.5 (LTS) komme gibt es mehrere Pfade. Hier ist mein vertrauter Pfad:
- 2.5.last https://docs.moodle.org/25/en/Upgrading
- 2.7 (LTS) https://docs.moodle.org/27/en/Upgrading
- 3.1 (LTS) https://docs.moodle.org/31/en/Upgrading
- 3.5 (LTS)https://docs.moodle.org/35/en/Upgrading

Dazu musst du auch Systemsoftware, v.a. PHP, vorwärts treiben. Hier ist die Kompat.liste:
http://www.syndrega.ch/blog/#php-and-dbms-compatibility-of-major-moodle-releases

See this recent discussion: Moodle Archive / End year procedure.

You can have a full Moodle instance on a SD card. Get a MoodleBox!

Moving course content from one Moodle to another is easily done via https://docs.moodle.org/en/Course_backup and https://docs.moodle.org/en/Course_restore. In any case take the course backups for safe keeping.

Did you see https://docs.moodle.org/en/Video ?