If you are in search of a portable and small electronic storage, USB flash drives and SSDs are two possible options. Compared with HDD drives, USB and SSD have less storage capacity. Despite a few similarities, USB flash drives and SSDs have some differences.
Also known as “pen drive” USB drive uses flash memory as storage technology. Flash refers to the types of EEPROM (for its acronym in English, electrically erasable programmable read-only memory), which use electrical charges to remove and install data in blocks, rather than having what to remove and install individual bytes. In comparison, the SSD can use one of two types of memory technology: EEPROM, which, as mentioned above, only can remove and install data one byte at a time, and DRAM memory (for its acronym in English, dynamic random-access memory). DRAM allows data to be accessed directly opposite of a fixed sequence. The “dynamic” portion of the name refers to the fact that DRAM requires periodic recharging, or updates their capacitors, to retain information.
As its name indicates, a USB flash drive is connected to a computer and other devices through a USB interface, it consists of a collection of wires that transmit data from the outside of a computer to its internal components, specifically its central processing unit and main memory. Since 2011, most USB drives use a standard interface high speed USB 2.0, which provides transfer rates faster data. In comparison, an SSD is connected to computers and other devices via SCIS (for its acronym in English, small computer system interface). It is a parallel interface, which means you can send and receive data simultaneously through the use of two parallel rows of connectors. Two common types of SCIS interfaces using SCSI-II SSD are 8-bit and UltraWide 16-bit SCSI.
Data transfer rates
Data reference rate refers to how fast a storage unit can transfer data to or from a computer. While USB flash drive uses the standard USB interface, it can offer transfer rates of data from 12 megabits per second (Mbps), the USB 2.0 standard allows rates of up to 480 Mbps. If they are compared, an SSD that uses an interface SCSI-II can provide rates of 18 Mbps, whereas a UltraWide SSD using a SCSI interface can provide 35 Mbps rates.
People usually rely on USB flash drives to store personal files do not take up much memory. Such files include videos, images and text documents. People often use SSD to store larger files belonging to application servers and systems. Examples include login information, authorization, index files, and swap library and databases.