Hi @Katherine Brock ,
Welcome to Microsoft Q&A forum and thanks for reaching out. If you use an Azure Integration Runtime that is in a not optimal region resulting in slow read/write, it is suggested to configure an Azure IR in another region closest to your data source. Could you please try IR in different region and see if that helps.
Also please refer to guidance mentioned in this document to boost copy activity performance running on Azure IR : Troubleshoot copy activity on Azure IR
Do let us know if this helps.
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