By using a 240-volt circuit (such as the outlet for an electric dryer), the car might be able to receive 240 volts at 30 amps, or 6.6 kilowatt-hours per hour. This arrangement allows significantly faster charging, and can fully recharge the battery pack in four to five hours.
EXFat is just an extended version of the FAT format. Unlike FAT, and FAT32, it can support files as large as 16 Exbibytes, and can support disk sizes up to 64 Zebibytes. FAT32 only supports files as large as 4GBs, and drives as large as 2TBs.
Here's a basic rundown of which format we recommend for your USB flash drive, broken down by use case. If you absolutely, positively will only be working with Macs and no other system, ever: Use Mac OS Extended (Journaled). If you need to transfer files larger than 4 GB between Macs and PCs: Use exFAT.