The problem this is solving is failed azcopy uploads on slow internet connections.
Firstly locate the AzCopyClient.js file and open it in editor
vim "/Applications/Microsoft Azure Storage Explorer.app/Contents/Resources/app/node_modules/se-az-copy/dist/src/AzCopyClient.js"
Add envVars.AZCOPY_CONCURRENCY_VALUE = 4; replace 4 with a number that works on your particular connection. The slower the lower. The default client does a calc based on CPU Cores and mine originally set the concurrent rate to 64 (8 cores * 8 I think)
You know you have it correct when you copy the azcopy command from Storage Explorer and it shows the export value
export AZCOPY_CRED_TYPE=Anonymous;
export AZCOPY_CONCURRENCY_VALUE=4;
./azcopy copy "/Users/jmcd/Downloads/ub3a.zip" "https://tgntablestoretest.blob.core.windows.net/blob1/ub3a.zip?se=2019-09-24T00%3A48%3A38Z&sp=rwl&sv=2018-03-28&sr=c&sig=<REDACTED>" --overwrite=false --follow-symlinks --recursive --from-to=LocalBlob --blob-type=BlockBlob --put-md5;
unset AZCOPY_CRED_TYPE;
unset AZCOPY_CONCURRENCY_VALUE;
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