Hard Drive Problems/External HDD


I just need to know that why are similar capacity, similar type, same transfer rate external hard disks are priced so differently
for example:
WD My Passport 1 TB External Hard Disk and WD My Passport Ultra 2.5 inch 1 TB External Hard Drive

Hi Ritesh!

Many things can affect the price of drives:

- capacity (GB/TB)
- type (SATA/SAS)
- speed (3Gbps/6Gbps)

As well as:

- technology (HDD/SSD/SSHD)
- cache size (16MB/32MB/64MB/8GB)
- rotational speed (5400RPM/7200RPM)
- size (3.5"/2.5"/1.8"/7mm/9.5mm)

Drives can have other brand-specific features that can affect price too.

Feel free to follow up with any additional questions you might have.

Good luck!

Hard Drive Problems

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I can answer questions about server hardware RAID and general storage for servers and PC's - hard drive issues, troubleshooting, advice, specs, and information. While some apparent drive/RAID array failures can be recovered, I can only provide advice/recommendations in the event of catastrophic data loss. I don't assist in actually recovering from this type of data loss on this forum.


I worked as an analyst in Dell server support for 2 years, and have since worked with many Dell PowerEdge servers. I am currently employed as IT Manager. I am currently ranked in the top 5 All-Time in Server Hardware and Hard Drives in a very popular and large forum similar to AllExperts.

I have a BS in Computer Science and have earned the following certifications: CompTIA Security+, A+, Project+; CIW Web Design, Database Specialist; Microsoft Windows 7; Dell DCSE Server. I am also an expert in Windows 7, Servers, and Hard Drives (I don't normally do XP - not because I don't know it inside and out, but because I have "retired" personal support for XP, and I want to see it die :)).

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