DLS Course 4: When Saving: "Permission denied: W4A1/Face_Recognition.ipynb"

Course Q&A Deep Learning Specialization Convolutional Neural Networks
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Problem is solved for me. you have to download all files from root folder(something like release/W1A2) and upload it to new release/W1A2 folder. Here is step by step procedure How to Fix read-only/unable to save/unable to submit assignment Issue