As I've discussed this with Karam before, I would add my 2 cents. Because his problem is with creating backups of optFS bigger than 4GB (vFAT doesn't accept files larger than 4GB, backupmenu doesn't provide mechanism for splitting tar's into 2 files for backuping/restoring), I think this may be workaround'ed by modifying backupmenu scripts to backup *to* partition formatted as ext3/ext4 (I would drop ntfs here).

Common sense tells me, that this may be achieved just like backuping *from* ext4 partition - by modifying backupmenu scripts. i'll look at this after returning from trip (I'll be back on sunday evening), but, maybe in meantime, more knowledgeable people (ivyking, I'm looking at You ) are able to help?