Here is a reminder of advice already provided to our customers on precautions they should take to protect vital business data from flood damage.
Ensure that you have at least two current backups stored in a safe and dry place away from any risk. These could be on universal devices such as a USB stick or backups extracted to a remove dry location via the Net.
For insurance purposes, it would be ideal that you have an up to date stocktake stored in your data. Otherwise, photos of stock in your store as well as in the back room would be the next step. Also consider taking photos of equipment you use to run the business – to verify what you had.