text_splitter

to_txt.sh

#!/usr/bin/bash

for f in *.txt_shard; do
    mv -- "$f" "${f%.txt_shard}.txt"
    FILENAME=${f%.txt_shard}.txt
    FILESIZE=$(stat -c%s "$FILENAME")
    echo "Size of $FILENAME = $FILESIZE bytes."
    split  --verbose  --bytes 1MB $FILENAME  $FILENAME  --additional-suffix ".txt"
    echo "Deleting $FILENAME"
    rm -fv $FILENAME
done