Hi,

 As I have read Multiple Lines of Text column will occupy 28 bytes in Sharepoint 2013. Please help me out to find the answer for the below question.

When I 'm storing 3000 characters in the Multiple line of text column , will be the bytes increased or it will be same as 28 bytes?

Note: I read  "A Multiple lines of text column can store as many as 63,999 characters, and you can specify the number of lines of text that you want to display when people enter information about an item. " from this below link.

https://support.office.com/en-us/article/Site-column-types-and-options-0d8ddb7b-7dc7-414d-a283-ee9dca891df7#__toc277149822

Hi,

The placeholder of Multiple Lines of Text column is defenitely larger than 28 bytes. In SharePoint 2013 the field type of Multiple Lines of Text column is 'Note' type, which can store total 2 GB char data. However, in a document library, the maximum number of characters for Multiple Lines of Text column is 255, and the reason is the 255 character limit in Document Information Panel in Microsoft Office.

The 28 bytes limit in https://technet.microsoft.com/en-us/library/cc262787.aspx#ListLibrary should be incorrect, and I will report it internally. Thanks for bringing this to us.

Here are another two links for your reference:
https://social.technet.microsoft.com/Forums/sharepoint/en-US/5e8cc504-03d0-4d26-81f9-1608c2c5881f/what-is-the-max-limit-for-number-of-characters-in-multiline-text-in-sharepoint?forum=sharepointgenerallegacy

http://sharepointtaproom.com/2011/01/16/max-length-of-a-multi-line-text-note-field-on-sharepoint-publishing-page/

Thanks,
Reken Liu