On the one hand, storing more data in each unit allows manufacturers to create larger-capacity products with fewer flash memory chips on the other hand, this will slow products' speed.įlash drives usually use TLC, while external SSDs usually use MLC or even SLC.Ĥ. SLC means that each storage unit can store 1 bit of data MLC means 2 bits TLC means 3 bits. Flash particles: As we all know, there are currently three main types of flash memory particles: SLC, MLC, and TLC. Without TRIM technology, the USB flash drive writing speed will become slower and slower.ģ. These technologies include TRIM, wear leveling, etc. On the other hand, the USB main control lacks some important technologies, which will affect USB performance and lifespan. However, flash drive master control usually supports 1 or 2 channels. SSD master control can allow SSDs to increase the number of parallel channels to 4 or up to 8. In general, in order to improve read and write speed, SSDs and external SSDs usually adopt multi-channel mode, which allows master control to operate multiple flash memory chips in parallel through several channels (just like RAID 0). Master control: Like SSDs, external SSDs use master controls with excellent quality, while USB flash drives usually use master controls with bad quality. USB 2.0 has a maximum transmission bandwidth of 480 Mbps, namely 60 MB/s, while USB 3.0 has a maximum transmission bandwidth of up to 5.0 Gbps, namely 500 MB/s.Ģ. Transport protocols: If you search in Amazon, you'll find there are still many USB flash drives using USB 2.0 protocol, while most of external hard drives have switched to using USB 3.0 protocol. There are mainly 4 reasons as to why flash drives perform worse than external SSDs.ġ. external SSD, flash drives have no advantages. However, when it comes to the performance of flash drive vs. If comparing external HDDs and flash drives, as normal, external hard drives are much faster in bulk data transfer while USB flash drives may be faster when transferring small bits of data. In general, the performance of external hard drives is better than that of flash drives. This is also one of the reasons why the capacity of flash drives is getting larger and larger. Tip: As NAND technology improves, the number of flash memory chips mounted on SSDs decreases without reducing capacity.
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How to choose between them? Please keep reading. The real topic of this post can be regarded as extanl HDD & SSD vs flash drive. Then, you may think of external SSDs. They are very like external hard drives (Both them are external drives and that's why I classify external SSDs into external hard drives, not into the flash drive category). Of course, the cable uses USB Type-A or USB Type-C interface, too. However, the USB external hard drive usually needs a matching cable to connect it to your computer. Thus, you can plug it directly into your computer to use. The flash drive is usually integrated with a USB Type-A or a USB Type-C interface. What Is an External Hard Drive or a Flash DriveĪ flash drive, also called thumb drive and pen drive, is a miniature high-capacity mobile storage product that does not require a physical drive and uses flash memory as its storage medium, while an external hard drive, also called mobile hard disk, is a hard disk storage product that emphasizes portability and realizes large-capacity data exchange between computers. If you also don't know the differences between them, this post will help you. However, they may just have a shallow understanding of external hard drive vs. Many people may be planning to buy an external hard drive or a flash drive for some purposes. Manage Flash Drive and External Hard Drive Better with MiniTool Partition Wizard.What Is an External Hard Drive or a Flash Drive.Just keep reading to get the related knowledge. Do you know when to buy an external hard drive or a flash drive? MiniTool shows you the differences between external hard drives and flash drives and explains the underlying causes.
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