[gparted cannot resize] (was: ubuntu 16.04. Change label extreme portable SSD)

[Uwe Brauer]

>>> "UB" == Uwe Brauer <oub at mat.ucm.es> writes:

> Hi

> I just received a scandisk extreme portable SSD.

>  Sudo mount tells me

> /dev/sdb1 on /media/oub/Extreme SSD type fuseblk
> (rw,nosuid,nodev,noatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096,uhelper=udisks2)

> And 

> sudo fdisk -l 

> /dev/sdb1        2048 1953523711 1953521664 931.5G  7 HPFS/NTFS/exFAT


The discussion about my question made me come to the conclusion that it
is best to split the disk in two, one with exfat they other with hfs+.

However when I try to resize with gparted a lock symbol appears which is
to be expected this it is mounted, when I unmount, however 
the exclamation mark appears and I cannot resize neither. 

Any ideas?

Regards

Uwe Brauer
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