Field kit v1.1.5 issue

I recently installed Field kit v1.1.5 to transfer wav files to my OP-1 Field. I am having issues transferring the files to my OP-1 Field. When I drop the files from my folder on my Mac to the OP-1 they transfer but once they’ve transferred the files mysteriously disappear. When I try to load the files on my OP-1 Field I cannot see them. Please advise.

aren’t they supposed to be .aif not .wav?

Yeah but the OP-1 now supports wav files too and I had no problems transferring other wav files to the OP-1 before I got this problem with transferred files disappearing.

The strange thing is that when I try to transfer those wav files again it tells me files already exists in the directory even though they have disappeared.