Creating Attributes & Attribute Sets in Magento

Très intéressant surtout la deuxième partie merci pour le partage.

Great video, Thanks

heard magento could be upgraded by more than one method. Could you show us the methods and also how to make backups and restore it incase the upgrade process failed. I tried upgrading via magentodownloader but it failed miserably causing service not available 503 error.