[SOLVED] Trying to format a 4TbHd in to 2 X 2Tb

I have just got a Seagate Portable HD and I’m having problems partitioning and labelling.
I already have 2 X 3TbHd’s - Both external, labelled EXT-01 & EXT-02.
when I partition and label the 4TbHd, I set partition to half the full size of 38154371, which is 1907728 & 1907729.
I then name them EXT-03 & EXT-04.

BUT…
When Gparted has finished, I have a problem.
EXT-03 has a mount point of /media/EXT-02 with the label still showing as EXT-03 in Gparted, while EXT-04 shows as unmountable.

I checked EXT-01 & EXT-02 and they show up as;
media/pooky2483/EXT-01 Label EXT-01
media/EXT-01 Label EXT-02

fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000e97af

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 314574313 157286133 83 Linux
/dev/sda2 314574848 331352063 8388608 82 Linux swap / Solaris
/dev/sda3 331354110 960501225 314573558 5 Extended
Partition 3 does not start on physical sector boundary.
/dev/sda5 331354112 645926377 157286133 83 Linux
/dev/sda6 645928960 960501225 157286133 83 Linux

Disk /dev/sdb: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000b090e

Device Boot Start End Blocks Id System
/dev/sdb1 * 63 488392064 244196001 83 Linux

Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009b408

Device Boot Start End Blocks Id System
/dev/sdc1 * 2048 3907028991 1953513472 83 Linux

WARNING: GPT (GUID Partition Table) detected on ‘/dev/sdi’! The util fdisk doesn’t support GPT. Use GNU Parted.

Note: sector size is 4096 (not 512)

Disk /dev/sdi: 4000.8 GB, 4000797855744 bytes
255 heads, 63 sectors/track, 60800 cylinders, total 976757289 sectors
Units = sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/sdi1 1 976757288 3907029152 ee GPT
Note: sector size is 4096 (not 512)

Disk /dev/sdj: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 45600 cylinders, total 732566646 sectors
Units = sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000104b7

Device Boot Start End Blocks Id System
/dev/sdj1 * 256 732566271 2930264064 7 HPFS/NTFS/exFAT
Note: sector size is 4096 (not 512)

Disk /dev/sdk: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 45600 cylinders, total 732566646 sectors
Units = sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xa0ee6df5

Device Boot Start End Blocks Id System
/dev/sdk1 * 256 732566271 2930264064 7 HPFS/NTFS/exFAT

I’ve managed to fix it.
I used GPT instead of MS-DOS and formatted the whole 4Tb instead of 2 X 2Tb.
I DID want to create 2 partitions but as I can now create one partition using the whole drive, I will leave it at that.
I was going to create 2 partitions as I thought Linux could not handle anything over 3Tb.