When opening a CSV in MS Excel, the software may auto-format long numbers and certain values. This corrupts the data and the value cannot be used for import or updating listings.
Option 1 - Highlight everything and re-format
This option does not prevent the formatting but needs to be done each time a CSV is opened in Excel.
Click the top-left corner of your worksheet to highlight all of the cells.
In the Home Menu, click the Number (formatting) menu.
Select Number from the drop-down menu:
Click the Decrease Decimal button:
(located under the number formatting menu on the right-side)
Option 2 - Import the CSV into your Workbook
This method is perfect for sellers who keep workbooks for analysis and inventory purposes as it will import the CSV into a workbook instead of opening the file outright.
Open a workbook, or create a new Excel workbook.
Click the Data tab, and select From Text/CSV
In the pop-up, select None for File Origin
Click the Load button
Note: if you opening a CSV from 3Dsellers, make sure the Delimiter is set to Comma
While you may still need to re-format fields such as Item IDs, the data will no longer be corrupt: