Sorry i don't think you explained your problem clearly.
I am wondering if the "error 23000 - uploaded file is too large" occurs when you upgrade the firmware of the router or upload the modem's bin file.
I found this all-in-one troubleshooting guide which must be helpful to you. Here it is: www.tp-link.com/en/article/?faqid=400.

Matthew cook wrote

Sorry i don't think you explained your problem clearly.
I am wondering if the "error 23000 - uploaded file is too large" occurs when you upgrade the firmware of the router or upload the modem's bin file.
I found this all-in-one troubleshooting guide which must be helpful to you. Here it is: www.tp-link.com/en/article/?faqid=400.

first of all first comment. registering here is quite confusing and takes toll of me.

2nd, I have the same problem.... as the title says" Error 23000 - uploaded file is too large, "

the firmware upgrade that I or we downloaded is simply "Error 23000 - uploaded file is too large"

Where can we find a proper upgrade data? coz i downloaded my version here http://www.tp-link.com/en/support/download/?model=TL-MR3220&version=V1 and that version says

" Error 23000 - uploaded file is too large, " I downloaded it thrice just to find the same occurrence of the problem .

Please reply, i`m very frustrated.

3220_V1 is a old hardware version which has been sold for several years, so normally it won't have such problem.
Therefore, please try to reset your 3220 and then try to upgrade the firmware first;
Also you can change another web browser.