Do we need power for hard disk yes or no?
A computer needs a form of memory that is non-volatile so it can load and execute programs (Volatile memory like RAM would work, but if the computer loses power, all the data is gone!).
So a computer doesn’t need a hard drive.
A hard drive is just storage media.
You can use any form of read only media if you want..
How long will a hard drive last if not used?
The conventional wisdom is that you should revisit your data every five years to make sure that you can still read it. The general consensus is that the magnetic platters in the drive will start to degrade in 5 years of storage. The bigger issue is that storage technology changes.
Is a 256gb SSD better than a 1tb hard drive?
A laptop might come with a 128GB or 256GB SSD instead of a 1TB or 2TB hard drive. A 1TB hard drive stores eight times as much as a 128GB SSD, and four times as much as a 256GB SSD. … The advantage is that you can access your online files from other devices including desktop PCs, laptops, tablets and smartphones.
Which is better 512 SSD or 1tb HDD?
In the rare case you can’t live without 1TB space, 512GB SSD is far better. The bottleneck of modern computers is HDD. CPU & RAM are pretty fast but HDD can’t keep up with them, so SSD is the optimum pair. 512GB is a good amount of space unlike 256GB.