Netapp Snapshots -> Can I restore files from it ?

It depends.  If it is NFS or CIFS then yes (block based LUNs can also work with more work) , just browse the volume and you'll see a ".snapshot diretory".  You can browse and pull the file and paste it back into the production volume.

I see that you have VMware mentioned, in that case you'll need to do some extra steps.  You will need to have flex clone to make this easier.  If you're using SMVI mount the backup.  Once mounted you can use a utility VM to browse to the VMDK you want to mount and pull the file from there. Once completed dismount VMDK and unmount backup

Are you using iSCSI or CIFS/NFS ?

if you are using an iSCSI LUN you will need to clone the lun, with the snapshots, and present to the server.

If using Windows CIFS, you can right click and select Previous Versions

I use cifs and nfs

Right Click the Windows folder, and select Previous Versions, and you will see the Data and Time of Snapshot, open that folder, and you can browse and copy the files. (the snapshot is read only)

When I connect to my cifs from my WIN7 machine, then I click Restore previous versions, but there is no choice.
Do I have to configure something extra ?

ok I found something, when I right click directly the share.

what do you recommend, can I stopp my backup job which runs all 6 hours at Symantec ?

ok I understand.
My goal is to eliminate the cifs backups just during the day.
I have incremental backups all two hours, but this takes now too much time.
With your recommendation I can change this and I make just one incremental backup of cifs per day and on the weekend the full. And during the day I can use the netapp snapshots.

Is it possible for each user to restore files when I have snapshots enabled ?
Or can I set some security on the netapp ?

Ok I see.
Is it possible to set some security ?