Help Lacie 2big network v2 and lacie 2big network v1

Hi everybody
i have two system lacie 2big V1 and V2
wich is the procedure to proceed updating to last version (and wich is ?)
any can suggest where i can found lost version because support say me
you cannot download and update at last vesrion but you need to mount all version
for the model.
version 2.0.7 2big network v1 wich next on web site lacie i found ver 2.2.12 ??????
version 2.2.12.2 2big network v2
I m not very expert but i need HELP PLEASE
i have two system lacie 2big V1 and V2
wich is the procedure to proceed updating to last version (and wich is ?)
any can suggest where i can found lost version because support say me
you cannot download and update at last vesrion but you need to mount all version
for the model.
version 2.0.7 2big network v1 wich next on web site lacie i found ver 2.2.12 ??????
version 2.2.12.2 2big network v2
I m not very expert but i need HELP PLEASE