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Vaasu RapellyVaasu Rapelly 

What is the File Formats that you cannot be uploaded into Contacts or Accounts Data?

What is the File Formats that you cannot be uploaded into Contacts or Accounts Data in Sales Application? 
Awa NeytonAwa Neyton
Writing a research paper is quite involving, unlike composing master papers reviews (https://rankmywriter.com/masterpapers-com-review)  a term paper. It requires comprehensive research, analysis, and concluding the main theme. The document evaluates the comprehension abilities of a student pursuing a particular course unit.
Uk PopsUk Pops
According to Ukpops Media (https://ukpops.com) there are some files that are always encrypted with strong security 🔐.
But rephrase your questions in the right way
AnkaiahAnkaiah (Salesforce Developers) 
Hi Vasu,

For data import to any object in salesforce will allow only CSV formatt.

Please refer the below article.
https://help.salesforce.com/s/articleView?id=000313396&type=1

If this helps, Please mark it as best answer.

Thanks!!
Amit BanerjiAmit Banerji
HI Vasu,

As far as I understand your question. One would not be able to upload files with the following extensions or formats.. 

.htm, .html, .htt, .htx, .mhtm, .mhtml, .shtm, .shtml, .acgi, .svg.

The reason seems to be some security setting which is enabled on the org. 

Kindly mark this as best answer if it helps.

Thank you