The main intention of using external hard drive is to keep data backup

Can you repeat this sentence, but add in punctuation?
The main intention of using external hard drive is to keep data backup.
input: Both cameras support twoway audio with an integrated microphone and speaker allowing users to listen in on an area as well as playback recorded audio to visitors or intruders remotely see video
fixed: Both cameras support two-way audio with an integrated microphone and speaker, allowing users to listen in on an area as well as playback recorded audio to visitors or intruders remotely (see video).
input ---- Cameras autofocus is improved time between shots is reduced
output ---- Camera's autofocus is improved, time between shots is reduced.
Add punctuation: Most of the medical complications of anorexia nervosa result from starvation Few organs are spared the progressive deterioration brought about by anorexia
A: Most of the medical complications of anorexia nervosa result from starvation. Few organs are spared the progressive deterioration brought about by anorexia.
QUESTION: Fix punctuation: 8 For behold you have loved truth The obscure and hidden things of your wisdom you have manifested to me
ANS: 8 For behold, you have loved truth. The obscure and hidden things of your wisdom, you have manifested to me.
input ---- 42 And Jonathan said to David Go in peace for as much as we have both of us sworn in the name of Jehovah saying Jehovah be between me and thee and between my seed and thy seed for ever And he arose and departed and Jonathan went into the city
output ----
42 And Jonathan said to David, Go in peace, for as much as we have both of us sworn in the name of Jehovah, saying, Jehovah be between me and thee, and between my seed and thy seed for ever! And he arose and departed; and Jonathan went into the city.