Split all the files into intended sizes inside a folder with 7zip

split-zip-files.sh

#! /bin/bash

# a - add to archive
# -mx0 - copy only
# -v250m - makes split of 250 MB of each files
#7z a <new_name>.7z -mx0 -v250m <intermediate_name>.7z

# set the minimum size in bytes (here: 100mb)
minimumSize=100000000
for i in *.7z; do
  # get actual size of the files
  actualSize="$(wc -c <"$i")"
  if [ "$actualSize" -gt  "$minimumSize" ]
  then
    # get the file name without the extension
    fileName="${i%.*}"
    
    # create a directory as the same name of the file
    mkdir "$fileName"
    
    # move the large file to the directory
    mv "$i" "$fileName"
    
    # change to the directory
    cd "$fileName"
    
    # make the large file intermediate
    changedFileName="_$i"
    mv "$i" "$changedFileName"
    
    # split the files into 100mb parts
    7z a "$i" -mx0 -v100m "$changedFileName"
    
    # delete the intermediate file
    rm -f "$changedFileName"
    
    # restore the directory
    cd ..
  else
    echo "$i is less than 100mb"
  fi
done