If the file browser feels too modern, there are no suitable cartridges available, you don’t want to overwrite an existing BASIC program, or you simply prefer command-based input, then sw64 is a fantastic option!
Download the program, copy it to your C64 disk and load sw64-c000.prg
and start with sys49152 or sys49152, drive to set the current sd2iec drive. Alternatively, there is also sw64-9000.prg
one that uses different memory areas. You can start it with sys36864 or sys36864, drive for setting the current sd2iec drive