Answers for private customers

The Knowledge Base for private customers is already largely up to date. A few individual articles are currently being revised and will be updated shortly. We thank you for your understanding and look forward to providing you with the latest information on using mailbox.

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Alphanumeric sorting of files

The file manager in Drive uses alphanumeric sorting to display files. It interprets the characters of the filename as a string, which is evaluated sequentially. A "1" always comes before a "2", but a "2" comes after an "11". This can lead to unexpected effects, for example, this sorting:

1_Invoice-January.pdf
11_Invoice-November.pdf
12_Invoice-December.pdf
2_Invoice-February.pdf

Figure 1: Single-digit numbering is not a good idea. Leading zeros will solve the problem.

If you want to display these invoices sorted by month, it helps to add the number of the month in two-digit notation at the beginning of the filename (i.e., with a leading zero):

01_Invoice-January.pdf
02_Invoice-February.pdf
11_Invoice-November.pdf
12_Invoice-December.pdf

Figure 2: Invoices or similar files can be sorted well by month.

Figure 3: For letters, alphabetical order applies.

If you want to store and display a larger number of files in a sorted way, it is recommended to start with two (or more) leading zeros, such as 001-Invoice-Customer1.pdf. This creates space for 999 entries.