# Serialize To File
##  Serialize To File
### Description
The Serialize To File transform stores rows of data in a binary format in a file. The binary format has an advantage over a text (flat) file because the content does not have to be parsed when read back. The metadata is stored in the file as well.
The Serialize to file transform supports a write-once access pattern, and does not support appending to existing files.
| Hop Engine | ✓ |
| ---------- | ------------ |
| Spark | ? |
| Flink | ? |
| Dataflow | ? |
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