OK don't confuse getting all the backup sets in one tape (an append) with getting all the backup sets on the same B2D (which is only an append if you want to use the same BKF file) Trying to split the job selections but use the same B2D device is not an append operation
Some points:
1) Symantec recommends starting all jobs that store on disk based targets as Overwrites (unless you allocate the maximim bkf file size on creation)
2) To make a job for your Exchange selection use the same B2D device as that for file system data - just specify the same device name in the backup job properties for both jobs
3) If you want both jobs to run at the same time then increase the Concurrent Operation Count on the B2D device
4) USB disks must have standard backup to disk folders configured on them - DO NOT USE the Removable Backup to Disk folder type as this is for cartridge based media where the device itself remains connected to the server (Such as RDX etc)
5) If you intened to unplug the USB device then make sure you are running Backup Exec 2010 R2 later - earlier versions of Backup Exec did not handle unplugging USB disks.
6) GRT backup sets (i.e. for Exchange) don't append anyway because they must have a unique IMG folder for each set - however becasue of a possible issue reclaiming space when a set is expired, you must still set the GRT job to start as an Overwrite.
