在备份文件时，您可能会发现自己在争论哪种类型的“驱动器”最适合您的需要。哪一个更好，一个普通的外部硬盘驱动器，一个SSD，还是一个USB闪存驱动器？今天的超级用户问答帮助好奇的读者为备份解决方案做出正确的选择。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

图片由AmsterdamPrinting.com网站（Flickr）。

问题

想知道USB闪存驱动器是否可以可靠地用作手动备份驱动器的超级用户读者医生：

I am c***idering using several large USB drives as my backup media, with redundancy for important files. I am curious if this is a viable alternative to an external HDD.

Everything I have been able to read on this topic so far discusses shortcomings that do not really apply to us. Flash has limited rewrites, but we do backups manually, not using automated software, so that is basically irrelevant.

It is more expensive per GB, but we can fit everything important on a couple of 128 GB flash drives, plus one for redundancy of our critical files. We would store them safely, so there are no issues of losing or dropping them.

What are the technical pros and c*** of using USB flash drives as backup storage? What would be the comparative reliability under safe storage conditi***?

USB闪存驱动器能否可靠地用作备份驱动器？

答案

超级用户贡献者Brendan Long为我们提供了答案：

I cannot think of any reason to use USB flash drives for backups. First off, read the reviews of the most popular 128 GB USB flash drive on Newegg and ask yourself if you want to use that for backups:

PNY 128GB Turbo USB 3.0 Flash Drive Model P-FD128TBOP-GE (Newegg)

Some Choice Quotes:

• C***: Bought four and they all worked in the beginning, all but one stopped working. One was only used three times and only contained one **all file. RMA-ed one last week, two others failed today.
• Pros: It was defective from the ***et, so my friend did not lose any data.
• C***: Died after one use, tried it on three different PCs and it was no longer recognized. Had to pay to return it.

I think you get the idea. Both spinning disk hard drives and SSDs are much more reliable than the average USB flash drive.

Beyond that, spinning disk hard drives are probably faster too (although with worse random access times, but that does not matter for backups). SSDs will be much faster and good SSDs will be even more reliable than spinning disks.

My Advice Would Be:

• C***ider building a networked backup solution so you can use it for multiple projects and so you will have enough usage to justify things like higher redundancy, multi-site backups, etc. This would also save you money by letting you use larger disks with an optimal cost per GB. Or just pay someone to host your backups for you. 128 GB is tiny.
• If you just want good backups, use a few spinning disk hard drives and you will be fine. Use the money you saved to get more redundancy. Maybe buy them from different batches if you are paranoid.
• If you need even more reliability or speed, c***ider SSDs. You can get very high quality 128 GB SSDs for approximately $250, and there are probably good ones in the $100 range.
• Do not use USB flash drives.

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