File uploading slow

Thanks for your help. Using the batch upload method, how to I "group files that are being uploaded into one or more batches"? Also, do I use filesUploadSessionStart for each file, or do I use it once, and append for every other file? Is there anywhere where I could find an example of uploading multiple files with a batch upload?

Edit: I found your example here. My code is as follows:

var entries = []
for (i in storageFilePathsToUpload) {
	let fileData = fs.readFileSync(storageFilePathsToUpload[i])
	dbx.filesUploadSessionStart({
		contents: fileData,
		close: true,
	})
	.then(function (response) {
		entries.push({cursor:{session_id:response.session_id,offset:fileData.length},commit:{path:packPath+packFilePathsToUpload[i]}})
		console.log("entriesinprog")
	})
	.catch(function (err) {
		console.log(err);
	});
}

console.log(entries)
dbx.filesUploadSessionFinishBatch({entries:entries})
.then(function(response){
	dbx.filesUploadSessionFinishBatchCheck({async_job_id: response.async_job_id})
	.then(function(response){
		console.log(response)
	})
	.catch(function(err){
		console.log(err)
	})

	}).catch(err => {
		console.log(err)
	})

It's not working because it's not executing in the right order. The filesUploadSessionFinishBatchCheck is logging its response before the filesUploadSessionStart has finished uploading. Why is this, and how could I only finish the batch once the for loop has finished? (I'm not in an async function). It might sort of relate to this thread, but I obviously can't use .then on a for loop.

Thanks once again for your help.

Edit 2: I got the above working, and now my code looks like this:

async function startSessions () {
	entries = []
	for (let [index,val] of storageFilePathsToUpload.entries()) {
		let fileData = fs.readFileSync(val)
		await dbx.filesUploadSessionStart({
			contents: fileData,
			close: true,
		})
		.then(function (response) {
			entries.push({cursor:{session_id:response.session_id,offset:fileData.length},commit:{path:packPath+packFilePathsToUpload[index]}})
		})
		.catch(function (err) {
			console.error(err)
		})
	}
}


startSessions().then(()=>{
	console.log(entries)
	dbx.filesUploadSessionFinishBatch({entries:entries})
	.then(function(response){
		dbx.filesUploadSessionFinishBatchCheck({async_job_id: response.async_job_id})
		.then(function(output){
			console.log(output) // THIS RETURNS { '.tag': 'in_progress' }
			// get share link and send it
			getShareLink("/test").then((response)=>{res.send(response)}).catch((error)=>{res.send("error");console.error(error)})
		})
		.catch(function(err){
			console.error(err)
		})
	}).catch(err => {
		console.error(err)
	})
	
}).catch((err)=>{console.error(err)})

When the output of filesUploadSessionFinishBatchCheck is logged, it gives { '.tag': 'in_progress' }. Is there a way to not run the code until the batch is finished?