SD card file access via usb

got a PixRacer that´s damaged by a crash and resoldered, sd card now glued in.
Works again like a charm … but now I need to edit extras.txt and the mixer.
QGC ML console “cat /fs/microsd/etc/extras.txt” perfectly displays the desired file but how can I edit the entries?
QGC widget files doesn´t go into /fs/microsd/etc folder and shows Nak received, error: unknown error code

works now, Mac has written hidden support files that have disrupted the process. QGC files widget (USB connected) can download and upload files to the sd card. It cannot overwrite any files which have to be deleted before e.g. with rm /fs/microsd/etc/extras.txt via mavlink console.

won´t work after all. This Mac folders on the sd card have to be deleted via mavlink console before … and that doesn’t´t work for .Spotlight-V100
How can I successfully delete it if the sd card is not removable firmly glued in?
As long as this folder exists file widget has no access to the ETC folder:
renaming .Spotlight to zzz partially solved it
/fs/microsd:
dataman
log/
params
.Spotlight-V100/
logdata.txt
etc/
mission_log/
nsh> rmdir .Spotlight-V100
nsh: rmdir: rmdir failed: Directory not empty
nsh> cd .Spotlight-V100
nsh> ls
/fs/microsd/.Spotlight-V100:
Store-V2/
nsh> cd Store-V2
nsh> ls
/fs/microsd/.Spotlight-V100/Store-V2:
2BA7B381-D2CC-4E42-87C9-1A85A2B7/
nsh> cd 2BA7B381-D2CC-4E42-87C9-1A85A2B7
nsh: cd: chdir failed: No such file or directory
nsh> cd “2BA7B381-D2CC-4E42-87C9-1A85A2B7”
nsh: cd: chdir failed: No such file or directory
nsh> rmdir 2BA7B381-D2CC-4E42-87C9-1A85A2B7
nsh: rmdir: rmdir failed: No such file or directory
nsh> rmdir “2BA7B381-D2CC-4E42-87C9-1A85A2B7”
nsh: rmdir: rmdir failed: No such file or directory