Write protection on USB flash drives or SD cards is a handy function aiming to prevent accidental file deletion and block suspicious files like virus and un-authorized sources. External data storage devices are very common devices and they are widely used these days, as they are portable and users can take them anywhere they want. When a USB disk is write-protected, it turns into read-only. In that case, any action to add or edit data into that disk will be denied. All attempts related to writing action will be prevented, such as add or create new file, edit existing data, delete files that already present, formatting current USB disk, etc. Another reason people only give readable access to their storage device is to prevent others from sharing content stored on the disk.
Drawbacks to USB flash drives include the ability to handle a limited number of write and erase cycles before the drive fails, data leakage and exposure to malware. Data leakage is a problem because the devices are portable and hard to track. A security breach due to malware can occur when the device is plugged into an infected system. However, encryption and a routine scan of the USB flash drive are common approaches in protecting against a security breach.
Certain USB flash drives comes with write protector switch in them, using which you can write protect the USB flash / pen drive or make them read only drives. If the write protect feature is missing in the USB flash / pen drive then you can use USB Write Protector utility.
USB Write Protector is another free utility that allows you make write protect your USB flash / pen drives just like Thumbscrew mentioned above. This is a very small utility that you can always carry with you in your portable drive.
The various writable and re-writable forms of CD and DVD are portable storage media supported by the vast majority of computers as of 2008. CD-R, DVD-R, and DVD+R can be written to only once, RW varieties up to about 1,000 erase/write cycles, while modern NAND-based flash drives often last for 500,000 or more erase/write cycles. DVD-RAM discs are the most suitable optical discs for data storage involving much rewriting.
But I think, the best method to prevent your pendrive from being attacked by the virus is to have a physical write block. EasyDisk pendrives have the mechanism where by you just need to set the notch to write block if you want to write block the pendrive. By doing this, the virus is unable to copy itself into the pendrive.
Software and hardware write blockers do the same job. They prevent writes to storage devices. The main difference between the two types is that software write blockers are installed on a forensic computer workstation, whereas hardware write blockers have write blocking software installed on a controller chip inside a portable physical device.
The rapid advancements in flash technology have made portable SSDs into a huge product category over the last few years. These developments have also not left the ubiquitous UFD (USB flash drive) behind. While native USB 3.2 Gen 2x2 flash controllers have enabled blistering speeds in high-end UFDs such as the Kingston DT Max recently, Samsung's MUF-256DA USB Type-C Flash Drive has also shown that there is a value proposition in delivering a compact UFD that exhibits performance consistency without breaking the bank. To achieve this, Samsung has kept the BOM cost low by going in for the legacy 5 Gbps interface (USB 3.2 Gen 1) and limiting write speeds to around 100 MBps. This has also allowed the thermal design some leeway.
Though the Samsung Fit Plus 128GB displayed average write speeds in our large file test at 70 MB/s, it showed impressive reading performance, benchmarking an average rate of 356 MB/s. The Samsung Bar Plus 128GB offered similarly fast read speeds, making both models great portable options for storing movie collections. 2b1af7f3a8