External HD backup not mounting

[telegiovi]

and here:

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Modello: ATA SanDisk X400 M.2 (scsi)
Disco /dev/sda: 128GB
Dimensione del settore (logica/fisica): 512B/512B
Tabella delle partizioni: msdos
Flag del disco: 

Numero  Inizio  Fine   Dimensione  Tipo      File system     Flag
 1      1049kB  120GB  120GB       primary   ext4            avvio
 2      120GB   128GB  8447MB      extended
 5      120GB   128GB  8447MB      logical   linux-swap(v1)


Modello: Samsung S2 Portable 3 (scsi)
Disco /dev/sdb: 500GB
Dimensione del settore (logica/fisica): 512B/512B
Tabella delle partizioni: msdos
Flag del disco: 

Numero  Inizio  Fine   Dimensione  Tipo     File system  Flag
 1      32,8kB  500GB  500GB       primary  fat32        avvio, lba

[austin.texas]

Good. Now that is it recognized, it can be formatted.
Gparted is the easiest and best way to format your sdb1
Install Gparted:

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sudo apt-get install gparted

Open Gparted (Menu > Administration > Gparted)
Right-click on the sdb1 partition > Format > ext4 > Label > SAMSUNG > click the APPLY button on the toolbar

[telegiovi]

ok. I'll do it but before have I to save the contained data I suppose?

[austin.texas]

Yes, you do have to.

[telegiovi]

I was trying, but the option "format" is not enabled. Only enabled (by right clicking on the sdb1 partition) are "demount" "gestione flag" "information".

[austin.texas]

You must unmount (demount) the partition before you can format it.

[telegiovi]

Ok it works. But I do not find "label" and "Samsung", or how to write it

[austin.texas]

In Gparted, right-click on the partition you want to label.
You can enter your previous label "Samsung", or use a new label.

[telegiovi]

The option "etichetta partizione" is disabled. Perhaps I can format without giving names?

[austin.texas]

A Label is optional - not mandatory.

[telegiovi]

I did it. It is very quick. Now the external hd compares in the directory /media/.... but only if I connect it after the pc is switched on. It will not automatically be shown. Nothing changed. But thank you anyway

[austin.texas]

If the external Samsung drive is USB 3.0 it is best to connect to a USB 3.0 port.
What is the result of:

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lsusb

[telegiovi]

Here:

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   Bus 002 Device 004: ID 04e8:6093 Samsung Electronics Co., Ltd 
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 093a:2500 Pixart Imaging, Inc. USB Optical Mouse
Bus 001 Device 002: ID 1a2c:2124 China Resource Semico Co., Ltd 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
      

[austin.texas]

It is connected to a USB 3.0 port - so that is good.
Maybe someone else can comment on why it is not recognized when you boot.