External Drive: partition map check failed because no slices were found

Hi, I'm trying to use my new 1 TB WD Elements external drive to back up my 2013 macbook Air but it's not working in Timecapsule.

I get the following error message:

partition map check failed because no slices were found

That's the same message I get in First Aid whether I try to "repair disk" and "verify disk."

In Terminal, I typed in: "diskutil info disk2" and this is what I got:

Device Identifier: disk2

Device Node: /dev/disk2

Part of Whole: disk2

Device / Media Name: WD Elements 25A2 Media

Volume Name: Not applicable (no file system)

Mounted: Not applicable (no file system)

File System: None

Content (IOContent): GUID_partition_scheme

OS Can Be Installed: No

Media Type: Generic

Protocol: USB

SMART Status: Not Supported

Total Size: 1.0 TB (1000170586112 Bytes) (exactly 1953458176 512-Byte-Units)

Volume Free Space: Not applicable (no file system)

Device Block Size: 512 Bytes

Read-Only Media: No

Read-Only Volume: Not applicable (no file system)

Ejectable: Yes

Whole: Yes

Internal: No

OS 9 Drivers: No

Low Level Format: Not supported

Karims-MacBook-Air:~ karimladak$ diskutil info disk2

Would really appreciate the help!! Thanks