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  • Profile Image

    Uploading files fails when uploading large files

    Asked by Geoff  on November 30, 2015 at 03:43 PM



    my page incorporates gdrive uploads


    when i set my ftp plugin to approx 900 meg


    the upload fails


    i dont know if this is you or google

    Page URL:

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    Answered by Ben on November 30, 2015 at 05:07 PM

    I took a look at your form and I see that you have set it up to accept files up to 781.25 MB

    Please note that each MB that you would like to accept on your form should be multiplied by 1024

    At this time your upload limit is set to 800000 => 800.000 / 1024 == 781.25

    To accept the maximum size files (1GB) you would need to set it up as 1024 * 1024 = 1048576 instead.

    Do note that it is however not recommended to use multiple uploads file and accept such large files.

    I would say that multiple file uploads are good to up to 200MB most.

    You can see more about this here: Changing the Upload Size Limit

    Do let us know if you have any further issues and we would be happy to assist.

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    Answered by munchie on November 30, 2015 at 06:45 PM
    yes i understand but
    i still cannot upload a 600 meg file
    just says failure
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    JotForm Support

    Answered by EltonCris on December 01, 2015 at 01:55 AM


    Sorry but the multiple file upload field is not designed to accept files larger than 100MB so 600MB will most likely fail at some point. We suggest to use the single file upload instead or you may consider the file picker widget. This is more than capable of handling larger files.

    Thank you!

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    Answered by munchie on December 01, 2015 at 02:45 PM
    the ftp does do files larger then 100M but i am unsure of up to what size
    yes, for example people can upload 9 x 100 meg files at a time but not a
    900M single.
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    Answered by Ben on December 01, 2015 at 04:01 PM

    To avoid any confusion, please do let us know what is the exact issue?

    Based on your comments, I am under the impression that you are trying to test the exact size of the file upload(s) that is accepted by your FTP account that you have connected to your form on the Submissions page?

    If that is the case, please note that you should check this:

    1. with your hosting - to tell you how much your FTP account could get
    2. with your server administrator - to tell you how much your account is set to get

    (or just your host - depending on the server setup).

    If you are having some other issues do let us know about them in more details and we would be happy to look into them for you.

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    Answered by munchie on December 01, 2015 at 04:45 PM
    i am using a gdrive integration and i believe it is 15 GIG and i have only
    300 megs used.
    when i upload, for example, 8 x100 meg files of 100 meg each thay all go
    if i try one file of 800 megs, it fails.
    i will try uploading single files of increasing size to see where the
    failure begins
    i will let you know
  • Profile Image

    Answered by Ben on December 01, 2015 at 06:05 PM

    Thank you Geoff for the additional details. Please do note that the files are not transferred over FTP to Google Drive, it is being sent in a manner quite similar as the form is sending the file to us when submitted.

    The way that the multiple file uploads is working is by utilizing the javascript to send the files. This is great for small files, but it can fail if too many resources on you PC - browser are being used, and it is not able to continue, in which case it will not be able to resume and would fail.

    The single file upload is however more stable and should be able to work even with larger files.

    It is however depending on your own connection as well, so someone might have an issue if they are uploading such large files to the form - and have it at different size than you or me.

    When I tested uploads I was able to upload 600MB file without any issue, but others might have some issues, which is why we suggest using multiple file uploads up to 100MB and use the single file uploads for larger files.

    Still it is good to know that it might not work if the connection is unstable, or if the connection is too slow, as well as if the browser or device from which the submission is made is reaching its limits during submission.

    * Just to point out that I am not talking about weak machine only, but about the times when someone clicks submit and opens 10 other tabs and starts watching a movie (as an example).

    The File Picker Widget mentioned by my colleague is however build for uploads, so it is a good thing to check.

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    Answered by munchie on December 03, 2015 at 05:45 PM
    i did some testing and it seems to fail between 300 and 400 megs for a
    single file,
    does that mean anything to you?
    but it will do the max 800meg if it isn't one file.
    i looked at the file picker plugin...
    do you insert the css because it isn't in the integrations.
    is there a template with the file picker already setup??
    thank you, geoff
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    JotForm Support

    Answered by Kevin_G on December 03, 2015 at 09:22 PM


    I would suggest you to try the plugin mentioned above, I made a sample, however it only allows  200MB in a single upload, since it's a free account, you can try it and see how it works : 



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    Answered by munchie on December 03, 2015 at 09:45 PM
    thsnks, but as i mentioned in my last email
    my current setup works for large uploads
    but with multiple files (300 meg each) not for a single large one
    could you tell my the max file setting in kilobytes (1024 x 1000?)
    thanks again
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    JotForm Support

    Answered by mert on December 04, 2015 at 02:46 AM

    Actually, the max size of a file for uploading is 1 GB which means 1024x1024=1048576 in KB. For one request (submission), the max number of uploaded files is up to 25, so you can divide 1048576 to 25.

    Also, since the Google Drive accepts 5 GB, you need to divide that number to 5 pieces. All of the information about uploading could be find from the link below:



    I hope these information will meet your needs. For further assistance, please let us know.



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    Answered by munchie on December 04, 2015 at 01:45 PM
    thank you very much
    great support