Solved USB drive for flashing BIOS - Allocation unit size? Tags: New Build BIOS Motherboards USB Drive Systems Last response: October 19, 2011 1:40 PM in Systems Share loosley February 24, 2011 4:11:27 AM I have a USB drive on which I am going to copy over the latest BIOS for my motherboard (Asus P8P67 PRO). I am planning on updating the BIOS using the Asus EZ-Flash utility. I am going to format the USB drive as FAT32, as recommended by my motherboard manual. Here are the settings: Capacity: 3.65 GB File System: FAT32 (Default) Allocation unit size: Default allocation size My question is this: When formatting a USB drive that will contain a motherboard BIOS file, does it matter what allocation unit size I use when formatting the USB drive as FAT32? More about : usb drive flashing bios allocation unit size Best solution WR2 a b V Motherboard February 24, 2011 11:50:12 AM Hello loosley; It will not matter. The 4 KB default allocation size is fine. loosley October 19, 2011 1:40:08 PM Best answer selected by loosley. Can't find your answer ? Ask ! Publish Related resources: ForumBest file system and allocation unit size Corsair Flash Voyager 16GB ForumExternal Enclosure + Adv Format - power draw & allocation unit size ? ForumExFAT allocation size for music files? ForumFat32 for flashing ForumAlocation unit size ?is bigger better? ForumUSB Flash Drive 101 ForumUsb 3.0 Flash drive 16gb after formatting 14.6 ForumMy USB flash drive 32gb needs formatting but wont actually formatt ForumPartition Unit Size Forumwriting to write-protected usb key/thumb drive ForumHave to reformat a 3TB Hitachi drive ForumUSB Flash Drive Maximum Capacity for MoBo Bios Update via USB ForumProblem with 128 Gb USB flash drives ForumFlash Drive not recongnized in flashing bios ! ForumSanDisk USB Flash Drive nightmare (I/O error) ForumBootable USB and Flashing BIOS ForumBuilding a budget PC. ForumWhy is there a short on my cases USB port? ForumCorrupt Bios Woes..... Forum[Solved] In need of a middle unit, build suggestions please. More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !