# Agency Onboarding: How to Import a New Client's Existing Content Library
Author: Davis Baer
Author URL: https://www.oneupapp.io/blog/author/davis-baer
Published: 2026-09-15
Meta Description: Agency onboarding: how to import a new client's existing content library into OneUp using bulk upload and crossposting.
URL: https://www.oneupapp.io/blog/agency-onboarding-how-to-import-a-new-clients-existing-content-library

Onboarding a new client usually means inheriting years of their existing content — a Facebook Page full of posts, an Instagram grid with real history, sometimes several platforms at once. Manually reviewing and re-entering all of that into a new scheduling tool eats up the first week of any engagement before you've even started the actual strategy work.

OneUp gives agencies two tools that make onboarding faster: **bulk upload** for bringing in a client's content backlog directly, and **crossposting** for filling gaps between the platforms they're already active on.

## The two onboarding scenarios agencies run into

- **The client has content but it's not in OneUp yet** — this is a bulk upload problem. Their content exists somewhere (a spreadsheet, another tool's export, a shared drive), and you need it into OneUp's calendar quickly.
- **The client has content on one platform but not another** — this is a crossposting problem. They're active on Instagram but their LinkedIn is empty, for example, and some of that existing content is a reasonable fit for the gap.

Most onboarding situations involve a mix of both.

## How to bulk upload a client's existing content

1. From the OneUp dashboard, look for the bulk upload option when creating posts.
2. Bring in content via **CSV, Google Drive, or Dropbox**, rather than manually re-entering each post.
3. Add platform-specific details as part of the upload — for Instagram, that includes first comments, collaborator tags, and location tags.
4. Let OneUp automatically distribute the uploaded posts across the client's existing posting schedule, rather than manually assigning dates to dozens of posts.

## How to fill platform gaps with crossposting

1. Connect all of the client's accounts from the **Accounts** page.
2. Open the **Crossposting** menu and set up a workflow between their most active platform and the platform that needs a content foundation.
3. Filter and pace the migration so the newly populated platform looks like it's been consistently active, not backfilled overnight.

## Why this matters for client relationships

A client's first impression of your agency often comes from how quickly their new content calendar looks organized and active. Bulk upload and crossposting together mean you can go from "here's our new client's messy content history" to "here's a clean, populated calendar across every platform" in a single onboarding session instead of a week of manual data entry.

Ready to onboard your next client without the manual busywork? [Get started with OneUp](https://www.oneupapp.io/).


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