Sed Multiple Files insert apostrophe

[RIK312]

Hello all

I have this current sh code

DELETE=`$MEGASYNC --username $USER --password $PASSWORD --dryrun  --reload --download --local $LOCALDIR --remote $REMOTEDIR | sed 's/F  '$SEDLOCALDIR'/'$SEDREMOTEDIR'/g'`

an example of output of $DELETE is

/Root/W/my file 1.txt /Root/W/my file 2.txt /Root/W/my file 3.txt

but i need

"/Root/W/my file 1.txt" "/Root/W/my file 2.txt" "/Root/W/my file 3.txt"

what is the correct sed syntax for get the apostrophe?
Thanks so much