Need to update blob storage file without losing existing data

[robevans]

I'm having trouble finding a more efficient way of updating a blob storage.  I'm trying to insert new data into a blob storage file while keeping the existing data.  

Here is how the flow is currently working,

1. Get new Data
2. Get Existing data > Parse
3. Create new array with new data
4. Apply to each existing data to append to new array of existing and new data (the bulk of the time) - 26 seconds
5. Compose and Update blob storage with new data

Is there a more efficient way of updating the blob storage while keeping the existing data?

[robevans · Accepted solution]

I'm an idiot, I can just do a union.

[v-bacao-msft]

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