Nowadays, many PCs equip an SSD (Solid State Drive) instead of HDD (Hrad Disk Drive) as a data storage. SSD has severl advantages compared to HDD. It has no motive parts, meaning it causes no noise. SSD is tougher than HDD against tremor. It can be lighter and thinner. The access speed is superior, though it depends on some factors.
However, reports suggest that SSD is more likely to crash than HDD in some occasions.
ITProPortal: More SSDs means more data loss
This article does not describe the comparison between SSD and HDD concretely. But, it seems a myth that SSD is more reliable than HDD as a data storage.
SSD has some disadvantages so that it has not completely replaced HDD. First of all, SSD is much more expensive than HDD. Now, you can buy an HDD with some terra byte volume for less than 100 USD. On the other hand, you can get an SSD with only 250 GB volume for 100 USD. Most data servers are still composed of HDDs.
Recently, some next-generation data storages were released. Solid State Hybrid Disk is a mixture of SSD and HDD. It has already been adopted in severl PCs and iMac. Also, newly developing solutions are coming, such as helium drives and heat-assisted magnetic recording hard drives.
By the way, it is said that the mortality of HDD is some years. You should replace your data storage at least every five years. Fortunately, I have not encountered a crach of an HDD yet. But I need to consider to renew my main desktop PC.