You can configure each Lambda function with its own ephemeral storage between 512MB and 10,240MB, in 1MB increments. The ephemeral storage is available in each function’s /tmp directory.
Each function has access to 512MB of storage at no additional cost. When configuring your functions with more than 512MB of ephemeral storage, you will be charged based on the amount of storage you configure, and how long your function runs, metered in 1ms increments. For comparison, in the US East (Ohio) region, the AWS Fargate ephemeral storage price is $0.000111 per GB-hour, or $0.08 per GB-month. Amazon EBS gp3 storage volume pricing in US East (Ohio) is $0.08 per GB-month. AWS Lambda ephemeral storage pricing is $0.0000000309 per GB-second, or $0.000111 per GB-hour and $0.08 per GB-month. To learn more, see AWS Lambda Pricing.