It depends on several factors, as stated in the previous answer, you have the segment, home or business.
Then there is the architecture:
SCSI (bus controller with high speeds)
SSD (flash)
SATA (regular drive)
SAS (serial attached scsi, backwards compatible with SATA)
SAS and SCSI are mostly disks running at high speeds, this makes them more expensive.
SATA disks for home use at normal speeds (5400 or 7200 rpm) are expensive based on capacity and brand. If a company has the first 3 TB disk it will be very expensive, when 3 companies have those disks, prices will decrease because of competition
SSD is a technology that got affordable, but still a lot more expensive than regular SATA (with platters). This is because there are no turning parts and it uses faster memory.
Also a very nice thing to remember :
The faster the drive, the more expensive, there for it is normal that the better your IOPS are the more expensive it is.
Capacity has a price, but it is linked to the drives speed and the recent evolution in technology.
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主导价格的因素是细分市场：家庭磁盘最便宜，服务器磁盘最昂贵。
The factor dominating the price is the market segment: Home disks are cheapest, server disks most expensive.
这取决于几个因素，如前面的答案所述，您的细分市场是家庭还是企业。
然后是架构：
SAS 和 SCSI 大多是高速运行的磁盘，这使得它们更加昂贵。
根据容量和品牌的不同，普通速度（5400 或 7200 rpm）的家用 SATA 磁盘价格昂贵。如果一家公司拥有第一个 3 TB 磁盘，那么它会非常昂贵，当 3 个公司拥有这些磁盘时，价格会因为竞争而下降
SSD 是一种价格实惠的技术，但仍然比普通 SATA（带盘片）贵很多。这是因为没有转动部件并且它使用更快的内存。
还有一件值得记住的事情是：
驱动器越快，就越贵，因为 IOPS 越好，它就越贵，这是正常的。
容量是有价格的，但它与驱动器速度和最近的技术发展有关。
It depends on several factors, as stated in the previous answer, you have the segment, home or business.
Then there is the architecture:
SAS and SCSI are mostly disks running at high speeds, this makes them more expensive.
SATA disks for home use at normal speeds (5400 or 7200 rpm) are expensive based on capacity and brand. If a company has the first 3 TB disk it will be very expensive, when 3 companies have those disks, prices will decrease because of competition
SSD is a technology that got affordable, but still a lot more expensive than regular SATA (with platters). This is because there are no turning parts and it uses faster memory.
Also a very nice thing to remember :
The faster the drive, the more expensive, there for it is normal that the better your IOPS are the more expensive it is.
Capacity has a price, but it is linked to the drives speed and the recent evolution in technology.