how to format external drives
When I erase usb memory sticks I choose Mac OS extended journaled. After erasing the enhed is however, unusable. Although I'm running High Sierrra 10.13.6 the default option is Mac OS extended. The original format on the memory stick is MS-DOS fat 32. In general I want to erase external drives which then can be used on my iMac.
My iMac is from 2010.