fdisk -l /dev/sdc

Disk /dev/sdc: 222 MiB, 232783872 bytes, 454656 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
Disklabel type: dos
Disk identifier: 0x73696420

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sdc1  ?    1919950958 2464388050  544437093 259.6G 20 unknown
/dev/sdc2  ?    1330184202 1869160489  538976288   257G 6b unknown
/dev/sdc3  ?     538989391 1937352302 1398362912 666.8G 53 OnTrack DM6 Aux3
/dev/sdc4  *    1394627663 1394648999      21337  10.4M 49 unknown