The microSD card must be either the SDHC or SDXC type, 4 GB or larger capacity, and initially formatted by DL4 MkII before it is functional with the Looper. Before using the MicroSD card for longer loops, it will first need to be formatted for the device. Once formatted, your card must include no other existing files on it (other than DL4 MkII’s own Looper- created data). The best idea is to just purchase or dedicate a microSD card exclusively for DL4 MkII use (and, since the Looper wil