Increase in the maximum file size of resources to 1GB

Until now the maximum file size you have been able to upload to Tes Resources has been limited to 225MB. Now, you will be able to upload files of up to 1GB.

Tes Author Team

Increasing the maximum file size of resources to 1GB for all authors

In recent months we have had feedback from you saying that 225MB is not big enough for some of the richer, larger material that you would like to share on Tes. So our engineering team has been busy working behind the scenes and we are happy to announce that from today you will now be able to upload files of up to 1GB. This option will be open to all authors, regardless of tier.

Historically, we have allowed authors to host particularly large files in off-site repositories. With the new file size increase we request that for any material that is up to 1GB in size, the external links are removed on your resources and the actual files themselves uploaded by 30 January 2019. 

Any resources found to be housed on third party websites after 30 January may be removed from Tes.

We should also stress that - as a rule - bigger isn’t necessarily better. This increased limit will, of course, enable you to create bundles up to 20GB in size. Given that this is a dramatically large amount to expect anyone to download, we advise that a sensible approach is taken in keeping the size of files as low as possible as buyers will be put off buying multiple resources of such a large size due to download speeds and storage space.

High definition videos can sometimes be very large files. If you wish to share these, you may want to consider other options including uploading them on video hosting platforms such as Vimeo where they can be made private and or password protected, then provide a link and password within your resource.

We appreciate that this change does not address the issue of unsupported file types. Where authors have questions about those, please contact us on and we will discuss those on a case-by-case basis.


I usually link out to relevant materials, videos and websites (including footnotes and attribution). Can I still do this?

Links from resources out to other websites are permitted. This includes links to websites hosting original content that you would not be able to use in your resource. The resource itself, that the customer pays for, must be uploaded to the Tes website.

Am I allowed to include an embedded video?

If it’s a video you have made yourself, you can upload or embed it any way you like. If it is a video made by someone else who has posted it on a site such as Vimeo or Youtube, and they allow others to embed it for online playback, then you may do so within a resource. But downloading or ripping it and then uploading the file is not permitted.

I sell a link to multiple resources on an external hosting platform. I update the resource title and description to highlight different content hosted there. Can I still do this?

No. We do not allow the use of systems like Dropbox for your files unless the individual file size exceeds 1GB. In the situation that your resource does exceed the file size limit, you need to inform us ( Resources should not frequently change their identity as this causes confusion for buyers. For this purpose we would suggest posting and editing each resource individually and packaging them together in a bundle to allow your customer to gain value for money.

What if my file is over 1GB in size?

We suggest that you look for ways to reduce the size of your file so that it is less than 1GB. Teachers may be unable to download or store files of this magnitude. If you feel that the full file size is necessary then we will allow you to host the file in an off-site file repository that Tes staff are able to access, but request that you contact to clarify that you are doing so. If we are unaware of your plans to do so then the resource may be removed from the website.

Can I include external links to cloud service such as Dropbox?

No, all files should be uploaded and hosted on the Tes website with the exception of individual files over 1GB as explained above.

What if Tes doesn’t support the file type I wish to upload?

If the Tes website does not support a file type then we will allow you to host the resource elsewhere. We suggest that you inform us ( when this is necessary and clearly list the file types in your product description.

You could alternatively save your file as a ‘zip’ file containing the file type not supported by the Tes site. This will enable users to download and ‘unzip’ the file for use on their computer. Again, when using this method it is essential that you list the file types contained in the zip file in your product description so that your buyer knows what to expect.

My resources are interactive games that I cannot upload. What do I do about these?

We will allow links to interactive games as this is something the Tes website is not designed to support.

Can I link out to Google Docs?

While we do allow you to link to Google documents on the provision that these can be accessed by the downloader, we do not suggest it. Google documents need to be set up with appropriate permissions. To avoid these problems with permissions we would suggest that you transfer these documents to microsoft office or equivalent free software that enables offline copies to be made.

Why are you making these changes?

We know that several authors were in the past unable to upload particular resources to Tes because the file size was larger than our previous limit of 225mb, so instead put the files on cloud storage sites and linked to them. That was an entirely logical thing to do, and we allowed it. However, now that we have increased our maximum file size to 1GB we would like those authors to upload any files that can now go on Tes to our site instead. Our main reason is that this makes it vastly easier for us to deal with any queries or challenges we receive from customers who obtain them.