Data units in all related responses are now shifted to Bytes.

[instanceofMA]

Data units in responses of routes like listAllFiles, listAllCollections are now shifted to 'Bytes'. In their responses, keys like totalSize will now be a NUMBER (1024), instead of STRING (1024 Bytes OR 1 KB) which it was previously.
For doing its formatting on the front end, you can define this function in the SDK:

pretty(number) {
   // Converts a number to proper data size units
   const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
   if (number === 0) {
       return '0 Bytes';
   }
   else {
       const i = Math.floor(Math.log(number) / Math.log(1024));
       return parseFloat((number / Math.pow(1024, i)).toFixed(2)) + ' ' + sizes[i];
   }
}