There are currently 16 different Import Tools. Your company may not have purchased all 16, so you may see fewer on your Professional Services page. But the help docs for all 16 are going to be present.
There is some overlap in functionality in the imports. For instance, you can include a field in your Import file that assigns each to a or s. Or you can omit that field from your Import file and instead put your s in a Membership import file. Please take the time to review all of the options available to you in the import tools that you have, before you decide on a methodology.
All of the import tools are going to use flat ASCII-text files. The tools were built and tested on tab-delimited ASCII files. If you have an integration need that requires a different ASCII format, please contact the support team for assistance. You can put the import file on the server if you want to, but most people just keep them on their local computer and use the browser upload button to read in the import files.
When you import a file full of any type of records, one of two things is going to happen. The system will read each record and look at the Primary Key field and determine if the thing described in the record already exists. If it does not exist in Timesheet, then it will be added and all of the fields in the record will be populated into the database. If it does already exist then it will be modified by the additional fields in the record. Because this is a record-by-record decision you do not have to create separate files for new and modified records. However, if you have both new and modified records in a file then you must fill in all of the fields on the modified records. If you leave a field blank on the modified records then that field will be blanked out in the database--whatever value was there will be removed.
Each import tool has its own specific help file linked below. Those help files contain detailed descriptions of the import files and fields. There are also links to sample files that you can import (into a test system). Each of those help files also includes detailed usage instructions for the actual buttons you will push to perform the imports. The blue box (below) contains links to each of the individual help files.
There is also a specific help document that describes the overall process, and contains other practical advice for using these tools. That article is here: Outline for the Import Process.
If you have a problem with the tools, you will need to review this help file on how to go about getting support. Getting Support for the PS Tools
The tools and documentation and help files are all Copyright by Journyx, 2002. Details of that copyright are here.