here is my issue guys
hope somebody can help ---->

my optfs backup usually goes to 16 GB
cause i have repartitioned my N900

so :
i need MyDocs to be
NTFS or ext3/ext4

but : NTFS : N900 didn't read it as well as backupmenu (for restoring backup)

ext3/ext4 : N900 read it but backupmenu didn't (for restoring backup)

that's why i'm having issues with backupmenu
when ever the backup reaches 4gb while backing up backupmenu stops working with exit code 1
cause the filesystem of MyDocs is fat32 which doesn't accept more than 4 gb file