ubuntuuu

r3m@laptop:~$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 298.1G  0 disk
├─sda1   8:1    0  15.7G  0 part /
├─sda3   8:3    0 274.5G  0 part
└─sda5   8:5    0   7.9G  0 part [SWAP]
sdb      8:16   1   7.5G  0 disk
└─sdb1   8:17   1   7.5G  0 part /media/r3m/Windows USB
r3m@laptop:~$ sudo gdisk /dev/sdc
GPT fdisk (gdisk) version 1.0.1

Problem opening /dev/sdc for reading! Error is 2.
The specified file does not exist!
r3m@laptop:~$ sudo gdisk /dev/sdb1
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present


***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory. THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by
typing 'q' if you don't want to convert your MBR partitions
to GPT format!
***************************************************************

Exact type match not found for type code 7000; assigning type code for
'Linux filesystem'
Exact type match not found for type code 4300; assigning type code for
'Linux filesystem'
Exact type match not found for type code 7200; assigning type code for
'Linux filesystem'

Warning! Secondary partition table overlaps the last partition by
3756196120 blocks!
You will need to delete this partition or resize it in another utility.

Command (? for help):