Q: Regarding Reading and Writing Speed: The read and write speed of a USB flash drive is related to the USB interface of the computer, the size of the copied files, the format of the USB flash drive, and the computer . different Under the usage conditions, the read and write speeds , which is a normal phenomenon when using a USB flash drive. Q: Storage format description: The default format for storage devices is FAT32. Most devices that use memory cards (cameras, recorders, etc.) only support FAT32 format Formula. If you need NTFS or exFAT format, you need to convert the format on your computer or other device. Q: Copying folders is slower than copying individual files: When copying a single file, the system only needs to create one index. When copying a large number of fragmented folders, it is necessary to establish for each file Indexing, therefore, take a relatively long time. Moreover, if multiple tasks are executed simultaneously, it also increase the load on the computer .Causing congestion and slower speed. Regarding the heating phenomenon of USB flash drives: USB flash drive overheating is a normal phenomenon. After the USB flash drive is powered on, data transmission and reading occur, causing the electronic components inside the USB flash drive to heat up.The chip generates heat based on factors such as power and frequency. The number of read and write operations, as well as the speed of read and write operations. Due to the metal Metal USB drives have good thermal conductivity and heat dissipation, and overheating is a normal phenomenon and not a quality issue. usb flash drive.The chip can withstand a high temperature of 85. Please rest that the product not be damaged by heat. Memory:64GB Color:Black Material:plastic Package Contents: 1 * USB Flash Drives Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.