my NTFS external HDD, not seen by desktop, but is by laptop

[Stephen Constantinou]

Dear All

The Problem
I have the same version of Kubuntu on a laptop and desktop.  A new
external HDD (SATA, but not SDD), that connects via USB, is seen by the
laptop but not the desktop.  I can read and write to it when connected
to the laptop.  I cannot do this on the desktop, and Dolphin does not
list it as a Removable Device.

GParted
I configured the new HDD using GParted with a laptop.  I connected the
external HDD via USB to the laptop, booted the laptop from the GParted
bootable DVD.  GParted saw both HDDS, the existing HDD was bootable as
sda, and the external USB as sdb.  I selected sdb and made a new
partition table as follows:
    Create as: Primary Partition
    File system: ntfs
To my knowledge the whole HDD is one partition of 931.51GiB.

ISSUE
This command, “cat /etc/issue”, on both machines has this output:
“Ubuntu 24.04.1 LTS \n \l”

FDISK
On the laptop, which sees the external HDD connected via USB, the
command “sudo fdisk -l” outputs as follows:
Device      Boot Start End        Sectors    Size    Type
/dev/sda1     *  2048  1953520064 1953518017 931.5G  Linux
and the external USB HDD
Device     Start End        Sectors    Size   Type
/dev/sdb1  2048  1953523711 1953521664 931.5G Microsoft basic date
The same command, “sudo fdisk -l”, was used on the desktop, after
inserting the external HDD via USB.  The two internal HDDs were seen but
not the external USB drive.
Device    Start  End        Sectors    Size Type
/dev/sda1 4096   618495     614400     300M EFI System
/dev/sda2 618496 3907024064 3906405569 1.8T Linux filesystem
and
Device    Start   End        Sectors    Size Type
/dev/sdb1 2048    1050623    1048576    512M EFI System
/dev/sdb2 1050624 1953523711 1952473088 931G Linux filesystem

NTFS3
I tried the command “modinfo ntfs3” on both the laptop and desktop and
got identical output
stephanos at stephen-blackdesktop:~$ modinfo ntfs3
filename:       /lib/modules/6.8.0-55-generic/kernel/fs/ntfs3/ntfs3.ko.zst
alias:          fs-ntfs3
author:         Konstantin Komarov
compression:    Read-only lzx/xpress compression included
behaviour:      Enabled Linux POSIX ACLs support
description:    ntfs3 read/write filesystem
license:        GPL
srcversion:     C9569E5D5F9D12DCC61180B
depends:
retpoline:      Y
intree:         Y
name:           ntfs3
vermagic:       6.8.0-55-generic SMP preempt mod_unload modversions
sig_id:         PKCS#7
signer:         Build time autogenerated kernel key
sig_key:        06:43:68:37:39:C4:A1:CF:FE:BE:56:97:CE:F8:75:6B:18:65:14:26
sig_hashalgo:   sha512
signature:      B8:06:D8:08:A5:CA:1B:02:0D:9B:C8:AF:48:3E:A0:62:74:5D:94:82:
B4:63:CE:46:55:5D:35:75:91:5B:29:BE:0E:C9:66:9E:92:BD:05:DB:
DD:AE:1C:2D:3E:50:DC:57:43:85:1A:6E:8E:9F:EC:BB:21:B3:01:B4:
C4:63:95:A9:A6:65:E9:AB:44:1D:AA:B3:13:4A:17:12:1A:29:A1:F7:
62:02:0B:5B:47:60:74:36:3B:F5:49:0F:F6:64:2B:BB:1B:46:85:6C:
46:CC:8E:70:D6:C7:F2:DB:F8:69:CE:EA:05:E6:CA:93:2A:40:A2:EC:
56:59:A9:1C:EE:47:EB:46:A3:DA:65:E3:86:1D:99:6D:35:A3:C2:14:
41:12:48:33:15:94:05:B9:8D:E3:3E:04:29:60:19:3C:B6:50:B6:CE:
B6:39:17:39:29:97:31:22:2C:24:8E:00:C9:12:03:58:EB:50:A0:45:
07:BB:75:93:37:F3:AD:C6:9E:DE:D9:F7:4E:E4:32:93:F4:AC:7A:65:
A4:B8:D1:C7:03:27:B5:77:27:78:C6:80:37:A4:D6:60:E3:30:D8:30:
87:09:CA:E3:9B:C4:E8:9B:60:43:40:CB:76:05:32:10:D6:D2:DE:36:
54:EB:E0:86:43:4D:8A:D3:18:B4:43:5C:19:5E:50:E7:AE:C7:74:55:
A6:B4:86:F2:C9:35:C6:47:66:07:59:22:D9:14:35:D0:45:0D:E4:1A:
03:95:9A:A3:AB:32:5D:6E:45:35:89:91:DD:E1:DE:D4:BB:9E:55:15:
5D:BE:71:18:21:DB:81:F1:AE:DC:1F:1E:B0:D0:25:3F:6A:FA:9B:80:
EE:52:EA:7C:5B:C7:18:06:B1:4C:26:99:E8:33:9A:63:55:0C:C5:84:
A7:F2:D2:7D:BC:93:77:C3:67:85:D2:A4:55:BE:A7:D3:A3:99:2C:BD:
AD:F1:B0:02:3F:49:5B:61:99:07:1F:9B:DA:B8:56:6C:31:20:7D:D7:
87:5F:D4:2E:79:BF:6D:E2:93:14:E8:D0:98:18:99:6D:6A:FE:20:B6:
43:56:C4:FA:11:46:7F:41:D8:1E:AC:A6:15:D2:06:A7:54:C8:71:FF:
85:69:1D:97:18:91:E4:27:62:20:21:CA:B5:F1:B6:D3:9B:97:1F:AA:
4B:8D:15:49:1B:D8:A2:FF:32:44:87:CC:0B:CF:49:17:8D:17:BE:FB:
F4:7A:24:80:01:BE:E9:3D:1B:7D:6D:9F:04:AC:C4:7D:C9:5D:C4:C9:
EF:50:39:BD:7A:F7:CD:04:B4:76:45:9A:EA:F6:15:69:BD:2B:12:C7:
46:BD:6B:6E:99:45:3A:9C:B5:16:74:F5
stephanos at stephen-blackdesktop:~$

LSUSB
With the USB external HDD connected to the laptop, I tried the above
command and got the following output
stephanos at stephen-laptop1:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 003: ID 0bda:0138 Realtek Semiconductor Corp. RTS5138
Card Reader Controller
Bus 002 Device 004: ID 046d:c542 Logitech, Inc. M185 compact wireless mouse
Bus 002 Device 005: ID 04f2:b326 Chicony Electronics Co., Ltd TOSHIBA
Web Camera - HD
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 003: ID 1f75:0621 Innostor Technology Corporation IS621
SATA Storage Controller [this is the external caddie that holds my HDD]
stephanos at stephen-laptop1:~$
With the USB external HDD connected to the desktop, I tried the command
again and got the following output
stephanos at stephen-blackdesktop:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 001 Device 003: ID 1f75:0621 Innostor Technology Corporation IS621
SATA Storage Controller [this is the external caddie that holds my HDD]
Bus 001 Device 004: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 005: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 006: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153
Gigabit Ethernet Adapter
Bus 001 Device 007: ID 03f0:6711 HP, Inc Photosmart C4340 series
Bus 001 Device 008: ID 045e:00cb Microsoft Corp. Basic Optical Mouse v2.0
Bus 001 Device 009: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
stephanos at stephen-blackdesktop:~$
laptop

What does the laptop have that the desktop does not have?

How do I resolve this problem?

Much help needed, any help appreciated

Stephen, London, England, where it is cold