model has back up software?

I believe it comes with basic backup software.

Can I use this external hard drive for daily backups?

Yes, the WD 4TB Elements USB 3.0 2.5" Portable External Hard Drive is suitable for daily backups as it is praised for its good backup capabilities.

Well, no one answered the previous 2 with this question, so I'll ask again. What is the rpm of this drive? 5400 or 7200? Strange that that isn't included in the specs.

According to CNET's review it is 5400 RPM.

Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

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WD 4TB Elements USB 3.0 2.5" Portable External Hard Drive WDBU6Y0040BBK-WESN Black

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Western Digital 4TB Elements Hard WD|WDBLSS0040BBK-WESN R USB 3.2 Gen 1/USB 3.0 (USB 2.0 compatible) Model WDBLSS0040BBK-WESN

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USB 3.0 and USB 2.0 compatibility
Fast data transfers
Improve PC performance
High capacity
Formatted NTFS for Windows 10, Windows 8.1, Windows 7
2-Year manufacturer's limited warranty

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4TB ELEMENTS PORTABLE EXTERNAL DISC PROD SPCL SOURCING SEE NOTES

Best Seller Ranking	#33 in Portable External Hard Drives

Model
Brand	WD
Series	Elements
Model	WDBU6Y0040BBK-WESN

Performance
Color	Black
Interface	USB 3.0 (Micro-B)
Capacity	4TB

Features
Features	Fast transfer rates When connected to a USB 3.0 port, WD Elements portable storage delivers maximum performance for data transfers. Transfer a full-length HD movie in a fraction of the time it takes with USB 2.0. Performance may vary based on user's hardware and system configuration. USB 3.0 and USB 2.0 compatibility Works seamlessly with the latest USB 3.0 devices and is backward compatible with USB 2.0 devices as well. High capacity in a small enclosure The small, lightweight design offers high-capacity storage, making WD Elements portable storage the ideal companion for consumers who want to take their important files with them. Improve PC performance When your internal drive is almost full your PC slows down. Don't delete files. Free up space on your internal drive by transferring files to your WD Elements and get your PC moving again. WD quality inside and out We know your data is important to you. So we build the drive inside to our demanding requirements for durability, shock tolerance and long-term reliability. Then we protect the drive with a durable enclosure designed for style and protection. Formatted for Windows Formatted NTFS and compatible with Windows 10, 8.1 and 7. Reformatting required for other operating systems.
System Requirements	Formatted NTFS for Windows 10, Windows 8.1, Windows 7 Reformatting required for other operating systems

Dimensions & Weight
Form Factor	2.5"
Dimensions	0.82" x 3.23" x 4.35"
Weight	0.52 lb.

Packaging
Package Contents	Portable hard drive USB cable Quick install guide

Additional Information
First Listed on Newegg	September 28, 2026

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