converting files in workdrive to zoho office suite

converting files in workdrive to zoho office suite

How can I convert and excel file to zoho sheet? How can i possibly work at home without any access to my desktop through Workdrive, I have a trouble in opening the excel files because it requires me to convert it to zoho format other wise it will create another file without changing the original file. In addition to this, can we use the work drive simultaneously with my collegues?