Hi Sharmistha,
I agree with Ashish on the Failed records, but the errors reported here are the connector errors and not the record level errors.
If you want to get the record level errors you can look into the successful flag which states true/false and gives complete picture of success and failed records.

Also, while storing in list or any action, do check out the limitations as List has soft limit of 50K and you have to consider processing it in batches and consolidating externally.
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Sheshadri V
Fresh Gravity
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