2 - Is there any tutorial on how to install/upgrade DSM?   Baremetal:   See tutorial below for installing/updating to DSM 6.1.x. It can be used (with caution) for DSM 6.2.x: https://xpenology.com/forum/topic/7973-tutorial-installmigrate-dsm-52-to-61x-juns-loader/   DSM 7.x: https://xpenology.com/forum/topic/62221-tutorial-installmigrate-to-dsm-7x-with-tinycore-redpill-tcrp-loader/   Virtual:   DSM 6.2.x: https://xpenology.com/forum/topic/13061-