I am from India and I have some data that I want to store in AWS Glacier Deep Archive. From the current pricing sheet I see here, I see that Asia Pacific (Mumbai) costs around $0.002 whereas US East (N. Virginia) costs $0.00099 per GB per month.
So that means, if I store data in the US, it would cost me HALF of the amount that I would pay to store the data locally.
Suppose I have 1 TB of data that I need to store. In Mumbai, it would cost me $0.002 x 1000 = $2 per month. That's $24/yr and $480 for 20 years. The same would cost me $240 (half) over 20 years. So that's like saving $240 over 20 years or $1 a month.
Now that's pretty small for an individual user, but for a small/medium sized company, that's straight 50% savings.
Now I do understand that storing data closer to you is better etc., but my question is, assuming you already have an offsite backup and you are storing data in the cloud only for peace of mind, - Is there anything else that I should watch out for if I store data in the US ? Is there ANY difference (apart from the pricing of services) between these two regions ?
There is no difference with the service between regions. You can certainly store your data in the USA to take advantage of the lower price.
The only downside will be slower data transfer, but that's fine for backup purposes.
You can either upload directly into Glacier Deep Archive storage class, or use a Lifecycle Rule to move the objects to that storage class.